| |
Friction Ridge Community Resource Page
This resource is designed to provide credible
responses to questions about friction ridge examination. This information is
not presented as exhaustive and does not address all
aspects of the below topics. Comments and additional questions recommended
for posting on this website are invited. Please contact the SWGFAST
Website Committee with information or
community resources for posting.
*newest information on top
| Date |
Category |
Item |
Abstract |

11/10 |
Legal Document |
US v. Rose
A 395K 67-page .pdf Motion in Limine and Amicus Brief
AND A 51K 6-page .pdf U.S.
District court holding |
Motion in
Limine to Admit Expert Testimony of Latent Fingerprint
Identification Without a
Daubert Hearing, filed 7-27-09, arguing that 1) “The fourth
Circuit and Every Federal Court of Appeals continue to accept expert
evidence of the identification of latent fingerprints pursuant to
the ACE-V methodology without a Daubert hearing,” 2) the “lack of a
numerical point requirement does not render ACE-V unreliable,” 3)
“The recent NAS report does not purport to reach legal conclusions
about admissibility of latent print evidence,” and 4) “The NAS
report does not conclude that the methodology of latent fingerprint
identification is unreliable.” AND Amicus Brief on behalf of a
college of international practitioners and researchers involved in
the field of fingerprint identification and members of the SWGFAST
in support of the State’s Motion for Reconsideration, arguing that
“in excluding the fingerprint evidence in this case, the court
relied on testimony and evidence that does not represent an
appropriate and correct view of fingerprint methodology,” and “the
court improperly evaluated the reliability of fingerprint
identification by comparison with DNA statistical models cited by
defense experts. Such models neither show greater reliability of the
DNA model nor the unreliability of fingerprint identification.”
Holding from
U.S. District Judge Blake filed on 12-8-09 holding that “fingerprint
identification evidence based on the ACE-V methodology is generally
accepted in the relevant scientific community, has a very low
incidence of erroneous misidentifications, and is sufficiently
reliable to be admissible under Fed. R. Ev. 702 generally and
specifically in this case.”
|

11/10 |
Legal Document |
US v. Gerard
A 142K 4-page Firearms ruling filed 6-7-10 in the US
Army Trial Judiciary Fifth Judicial Circuit in Germany |
Grants the defense motion to exclude the testimony of a
firearms examiner because” testimony that it would be practically
impossible for a tool other than the seized AK-47 to have made the
marks on the cartridge case would be substantially outweighed by the
unfair prejudice associated with its unreliability. Specifically, it
states that “although AFTE is well-intentioned in it’s testing [of
examiners], the test results are not consistently reliable for a
number of reasons. The tests are not blind,… [and] do not
consistently mirror the level of difficulty presented during routine
operations.” |

11/10 |
Legal Document |
US v. Baines
A 52K 30-page .pdf file |
A holding filed 7-20-09 in the US Court of Appeals,
Tenth Circuit, affirming the conviction involving latent fingerprint
evidence, evaluating the
Daubert factors to conclude that the trial judge and district
court did not abuse their discretion in admitting latent fingerprint
evidence. |

11/10 |
Legal Document |
US v.
Keita
A 1.5 MB 53-page .pdf file |
A Defense Motion to Exclude Latent Fingerprint
Testimony dated 10-30-2009 in Superior Court of the District of
Columbia, based in part on the NRC NAS report, that “the relevant
scientific community does not generally accept that latent
fingerprint analysis can reliably and accurately demonstrate a
connection between a latent print and a specific individual.”
Argument: “The relevant scientific community for latent print
identification includes impartial scientists as well as latent print
examiners;” “The report of the National Research Council reflects
the conclusions of the relevant scientific community for latent
print identification;” “The relevant scientific community recognizes
that” 1) “a valid scientific basis for latent fingerprint
identification has never been demonstrated,” 2) “the claim that
latent print identification is infallible is scientifically
implausible and demonstrably false,” 3) the claim of a fingerprint
‘match’ is meaningless in the absence of probability rate data,” 4)
“latent fingerprint examination is a subjective analysis conducted
without standards or controls for bias,” and therefore “the latent
fingerprint testimony should be excluded as more prejudicial than
probative.”
|

11/10 |
Legal Document |
WA v. Sims
A 2.5 MB 102-page .pdf file |
A Defense Motion to Exclude Latent Fingerprint
Testimony filed 11-20-09 in King County Superior Court, claiming
that the “relevant scientific community” (including “impartial
scientists and scholars”) concludes much as the National research
Council (NAS report) – “does not generally accept that fingerprint
examiners can accurately and reliably connect a latent print to a
specific individual to the exclusion of all others” because “The
relevant scientific community recognizes that” 1) “a valid
scientific basis for latent fingerprint identification has never
been demonstrated,” 2) “the claim that latent fingerprint
identification is infallible is scientifically implausible and
demonstrably false,” 3) the claim of a fingerprint ‘match’ is
meaningless in the absence of probability rate data,” and 4) latent
fingerprint examination is a subjective analysis when conducted
without standards or controls for bias.” Therefore “the latent
fingerprint testimony should be excluded as more prejudicial than
probative”.
|

11/10 |
Legal Document |
OR v. Angius
A 1 MB 9-page .pdf file |
A 7-2-2010 ruling denying defendant’s Motion to Exclude
Fingerprint Evidence in Oregon’s Lane County Circuit Court through
an analysis of 12 factors based on State v. O’Key, 321 Or 285
(1995): testibility of falsifiability, peer review and publication,
known or potential rate of error, existence and maintenance of
standards, degree of acceptance in the relevant scientific
community, expert’s qualifications and stature, use that has been
made of the test, extent to which other courts admit the test into
evidence, novelty of the test, extent to which the test relies on
subjective interpretation of the examiner, presence of safeguards in
the procedure, and “other factors”.
|

11/10 |
Legal Document |
NH v. Connor
A 58K 7-page .pdf file |
New Hampshire Supreme Court opinion issued on 12-14-07
that deals with the concept of Verification “bolstering” the
examiner’s testimony. The court reverses and remands the case back
to trial because it finds that the direct testimony of the examiner
went too far in explaining the verification process and the
“hearsay” of the results of the second examiner during verification.
|

11/10 |
Legal Document |
MN v. Hull
A 129K 4-page .pdf file dated 9-30-08
MN v. Hull -
Appeal
A 132K 38-page .pdf file dated 9-9-10 |
MN District Court judge Steven Anderson denies
Defendant’s Motion to Exclude Fingerprint Analysis due to the
long-held general acceptance as scientifically reliable and that it
was adequately applied in this case. Appeal: The decision was not
reviewed at the appellate level because even if it was in error, the
error would be harmless because of other overwhelming evidence
supporting the guilty verdict. Justice Meyer writes (concurring)
that any error was harmless, but holding that the district court
should have done more to rule on the general acceptance and
reliability of latent print examination (rather than only ruling on
it’s acceptance as applied to this case).
|

11/10 |
Legal Document |
MD v. L.A. Johnson
A 421K 25-page .pdf file |
A March 26, 2008 Howard County Circuit Court order
denying the Defendant’s request for a Frye-Reed hearing and Motion
to Exclude latent print evidence holding that even though important
questions about latent print examination have been raised, (such as
the potential bias of verifying examiners, the lack of a requirement
that detailed notes be kept by the examiner, the lack of a criterion
for declaring a match or identification, the lack of available data
about error rate among examiners, and the advisability of using
level 3 details in friction ridge comparisons) that the examiner can
testify “that Defendant’s print closely or exactly matches” the
latent print and “can point out the similarities and the
differences, if any, between the latent print and the exemplar – but
that the testimony is constrained to not include “absolute”
testimony “to the exclusion of all others in the world.”
|

11/10 |
Legal Document |
Oregon
v. Quezada
A 14-page 1.3MB .pdf file |
A January 22, 2010 Public Defender Motion in Limine to exclude
latent print testimony because of “…the lack of concrete data
regarding the probability of fingerprint matches, the lack of
adequate safeguards against false matches, the heightened danger of
unfair prejudice, and a variety of other factors…” including that
“fingerprint analysis is not scientifically valid,” “there is
increasing doubt in the scientific and legal communities as to the
veracity of fingerprint evidence,” “there is no evidence regarding
rate of error in fingerprint analysis,” “there is a high degree of
subjective interpretation in fingerprint analysis,” “the trier of
fact cannot adequately verify the results of fingerprint analysis,”
“there is a lack of standards…,” and “there is no evidence regarding
the care with which the technique of fingerprint analysis was
employed.”
|

11/10 |
Legal Document |
US v. Anderson, Jenkins, Warren, Bates and English
A 1.4MB 40-page .pdf file |
The court concludes that “sufficient validation has been done and
sufficient standards exist” in firearms examination “to permit the
government’s expert to declare a firearms ‘match’ to a ‘practical
certainty,’ or to a ‘reasonable degree of certainty..,’ but that the
expert may not express his opinions to a ‘reasonable degree of
scientific certainty,’ or state that there is a match to an exact
statistical certainty... In addition, in explaining the meaning of
the term ‘practical certainty,’ … the examiner may not state that it
would be ‘practically impossible’ or ‘virtually impossible’ for
another firearm to have contributed the same marks.
|

11/10 |
Legal Document |
Bunche v. Florida
An 85K 4-page .pdf file |
The February 18, 2009 appellate court decision addressing the
concept of verification, holding that it’s improper bolstering for
the latent print examiner to testify that someone else arrived at
the same conclusion, or even to “explain the use of a second
examiner in the verification process” of ACE-V.
|

11/10 |
Legal Document |
Markham v.
Maryland
A 179K 36-page .pdf file |
A November 25, 2009 Maryland appellate court opinion addressing
the concept of holding a reliability hearing for latent print
evidence. Considering other cases and rulings, the court holds that
ACE-V is sufficiently reliable to not require another separate
hearing and that the concept should instead be the subject of
cross-examination of the latent print examiner during trial.
|
|
11/10 |
Legal Document |
MA v. Gambora limiting latent print examiner testimony |
A 56K 30-page .pdf file of the written opinion in MA v. Gambora. The
judge allowed testimony by a latent print examiner to
Individualization because he did not testify that the process was
error free. (p. 17) In the concurring opinion text (p. 28) it
is clarified that the testimony of the verifying examiner was
allowed because he testified that it was his "opinion" that the
defendant "made" the latent prints.
|
10/10 |
Information Resource |
Link
to the NIJ Fingerprint Sourcebook |
The Fingerprint Sourcebook by the Scientific Working Group on
Friction Ridge Analysis, Study and Technology (SWGFAST) et al. is the definitive guide to the science of
fingerprint identification funded by NIJ. The Sourcebook will be
published in stages.
|
10/10 |
Legal Document |
Judge Waddoups
Order limiting latent print examiner testimony |
A ≈94K 3-page .pdf
file of the September 16th order of US District Judge Waddoups. The
order limits the testimony of latent print examiners in the case but
the examiners did testify and present latent print demonstrations;
and the defendant was found guilty. |
|
7/10 |
IAI Resolution |
IAI
Resolution
2010-18. |
A ≈26K 2-page .pdf
file of the official IAI resolution. On July 16th during the 2010
IAI Annual Educational Conference in Spokane, WA., the IAI passed
resolution 2010-18 which rescinds the resolutions 1979-7 and 1980-5. |
|
3/10 |
Position Statement |
Collaborative Testing
Services, Inc. (CTS) issues a
Statement on the use of Proficiency Testing Data for Error Rate
Determinations. |
A ≈1,039K 3-page .pdf
file that expands and clarifies the official position of CTS; that
the use of CTS proficiency testing results should not be used a
source for the determination of error rates for forensic science
disciplines because results on "artifact samples" may not reflect
casework level examination standards, truly "correct" or "incorrect"
responses, or examiner performance in true casework situations. |
|
3/10 |
Legal document |
US District Court for
Massachusetts - Judge D.J. Gertner issues this
Procedural
Order for trace evidence. |
A ≈688K 3-page .pdf file
of the Judge Nancy Gertner's Order for both parties in each case to
identify in advance whether or not they are introducing trace
evidence, whether or not they seek a Daubert/Kumho hearing, and the
witnesses & exhibits required for the hearing. |
| 2/10 |
Legal document |
California v. Greenwood
Order
regarding the consideration and denial by Judge Schnegg of an
October 30, 2009 Motion to Exclude Fingerprint Evidence. |
A ≈18K 4-page .pdf file
of the Judge Schnegg's Order in Superior Court of the United States
of California for the County of Los Angeles, Case Number BA351185,
denying the defendant's motion to exclude fingerprint evidence
pursuant to People v. Kelly (1976) 17 Cal.3d 24. |
| 2/10 |
Legal document |
California v. Greenwood
Order
regarding the consideration and denial by Judge Schnegg of an
October 30, 2009 Motion to Exclude Fingerprint Evidence. |
A ≈688K 4-page .pdf file
of the Judge Schnegg's Order in Superior Court of the United States
of California for the County of Los Angeles, Case Number BA351185,
denying the defendant's motion to exclude fingerprint evidence
pursuant to People v. Kelly (1976) 17 Cal.3d 24. |
| 9/09 |
Legal document |
US v. Rose
Motion
In Limine to Admit Testimony Without a Daubert Hearing, with
Amicus Brief |
A ≈305K 40-page .pdf file
of the US
v. Rose: Government's Supplemental Motion In Limine to
admit expert testimony of latent fingerprint identification without
a Daubert hearing.
CCB-08-0149, with the associated Amicus Brief. |
Frequently
Asked Questions
 |
What is
SWGFAST? |
|
 |
 |
|
Answer: An
organization that establishes consensus guidelines and
standards for the forensic examination of fingerprints, palm
prints and foot prints. It was established in 1995 as one of
several forensic science Scientific Working Groups (SWG).
The overall intent of Scientific Working Groups is to
improve forensic science practices and build consensus
amongst federal, state, local and private forensic
laboratories and practitioners. Published SWG guidelines and
standards are widely recognized by the forensic community,
the courts, and the forensic laboratory accrediting bodies.
|
|
 |
 |
 |
What are
the legal rules for allowing expert witness testimony? |
|
 |
 |
Answer: Federal and state courts have
minimum qualifications for expert testimony. Federal Rules
of Evidence 702 states:
If scientific, technical or other specialized knowledge
will assist the trier of fact to understand the evidence or
to determine a fact in issue, a witness qualified as an
expert by knowledge, skill, experience, training or
education, may testify thereto in the form of an opinion or
otherwise, provided that (1) the testimony is based upon
sufficient facts or data, (2) the testimony is the product
of reliable principles and methods, and (3) the witness has
applied the principles and methods reliably to the facts of
the case. |
|
 |
 |
 |
What are the U.S. Supreme Court decisions related to the Daubert, Kumho & Joiner "trilogy"? |
|
 |
 |
Answer: The
Daubert
Opinion States that the trial judge must still screen
scientific evidence to ensure it is relevant and reliable;
“The focus, of course, must
be solely on principles and methodology, not on the
conclusions they generate.”
Factors the court should consider
include: Testing and validation, Peer review, Rate of error,
“general acceptance”
Answer 2: Kumho
decided that the same criteria for
Daubert
applies to both technical and specialized knowledge referred
to in FRE 702. Joiner
expands the criteria to include the relevance and
reliability of the scientific evidence. |
|
 |
 |
 |
What are
the minimum qualifications for a Friction
Ridge Examiner? |
|
 |
Is
fingerprint examination a science? |
|
 |
 |
| Answer: Yes. Fingerprint examination is
an applied science based upon the foundation of biological
uniqueness, persistence, and empirical validation through
observation. This is supported by the Daubert and Kumho
decisions. |
|
 |
 |
 |
Is
fingerprint examination reliable? |
|
 |
 |
| Answer: Yes. The scientific basis and
methodology of fingerprint examination is reliable. The
reliability of fingerprint examination is supported by the
principles of biological uniqueness and persistence,
probability modeling, and empirical data gained through over
one hundred years of operational experience. |
|
 |
 |
 |
Can
mistakes be made in fingerprint examination? |
|
 |
Can
an error rate be defined for erroneous identifications (false
positives) in friction ridge examination? |
|
 |
 |
| Answer: There are many definitions of
error and many variables when calculating error rates. In
regards to friction ridge examination error rate, the US
Supreme Court in Daubert v. Dow states that, “…the focus, of
course, must be solely on principles and methodology, not on
the conclusions they generate.” Others claim that the method
cannot be separated from the examiner and therefore they
must be combined. Examples of discovered error rates, that
an examiner may testify to, include: 1) personal erroneous
identification rate, 2) laboratory erroneous identification
rate, 3) estimated industry erroneous identification rate
(based on the approximate number of detected errors;
compared to the approximate number of examinations conducted
to date). |
|
 |
 |
 |
Why were there so many errors in the 1995 & 1998
Collaborative Testing Service (CTS) latent print proficiency
tests? |
|
 |
 |
| Answer: The CTS proficiency tests are
not limited to only qualified fingerprint practitioners.
There were no test controls over who took the test, the test
environment, time constraints, or individual vs. group
performance results. Other factors included but were not
limited to the lack of understanding by the participants of
the new testing process or use of its results. Non-answers,
erroneous individualizations, missed individualizations, and
clerical mistakes were considered equal errors to the test
provider. |
|
 |
 |
 |
What is the standard for friction ridge identification
(individualization)? |
|
 |
 |
Answer: The standard for
individualization is agreement of sufficient friction ridge
details in sequence when the following conditions have been
satisfied:
• Determined by a competent examiner, and
• Applied to a common area in both impressions, and
• Based on quantity and quality of the friction ridge
details, and
• Absent any discrepancy, and
• Reproducible conclusion
Answer 2: SWGFAST has published standards for all
conclusions. |
|
 |
 |
 |
How can two experts have different opinions on the same images? |
|
 |
 |
Answer: Two experts may reach
differing conclusions. Two experts having the same level
of training, experience, and ability should reach the same
conclusion. There are three types of differing
conclusions:
1) Value versus no value
2) Individualization versus inconclusive
3) Exclusion versus inconclusive
4) Individualization versus exclusion
Errors can be minimized by the systematic verification of
reported conclusions, according to agency policy.
(See also the SWGFAST
Quality Assurance Guidelines for Latent Print Examiners)
|
|
 |
 |
 |
What is the definition of AFIS "lights-out" and does this process result in matches? |
|
 |
 |
| Answer: The term “lights-out” means an
AFIS non-human process or workflow that is completely
automated. This type of result is possible because of
score-based algorithms that are able to automatically
process some deliberately-recorded fingerprints that score
above a pre-defined agency-specific threshold. Some agencies
do not employ lights-out processes, and those that do have a
wide range of score thresholds that result in human
intervention. |
|
 |
 |
 |
Can AFIS always make automated fingerprint matches? |
|
 |
 |
| Answer: No. Often, deliberately recorded
fingerprints are not high enough quality to achieve a score
above a “lights-out” threshold. Additionally, latent prints
currently return a ranked order of candidates based upon the
position, location and direction of friction ridge features.
A friction ridge examiner makes a decision of
individualization or exclusion using the application of the
ACE-V methodology which cannot be automated. |
|
 |
 |
 |
What is the National Academy of Sciences? |
|
 |
 |
| Answer: “The
National Academy of
Sciences (NAS) is an honorific society of distinguished
scholars engaged in scientific and engineering research,
dedicated to the furtherance of science and technology and
to their use for the general welfare.” |
|
 |
 |
 |
What is the "NAS Report"? |
|
 |
 |
| Answer: The
Strengthening Forensic Science in the United States: A Path
Forward report was published in February, 2009 by the
Committee on Identifying the Needs of the Forensic Sciences
Community; Committee on Applied and Theoretical Statistics,
National Research Council. It contained 13 recommendations
to improve the forensic science disciplines. |
|
 |
 |
 |
Can fingerprints be identified with absolute certainty? |
|
 |
 |
Answer: This is currently an issue that
is heavily debated in the community. To reject the
possibility of alternative hypotheses is unscientific
because science is always open to new information. However,
since fingerprint examination culminates with opinion
testimony, the lack of the examiner’s doubt is often
expressed as relative certainty in his or her conclusion.
Current research is attempting to quantify distinctiveness
and validate statistical and probability models that support
the examiner’s conclusion. There are several online
resources for additional information on this topic:
http://www.henrytempleman.com/
www.forensic.gov.uk
www.unil.ch/esc |
|
 |
 |
 |
Have statistical models been created for fingerprint identification? |
|
 |
 |
| Answer: Yes, there have been over 20
models proposed over the last century that are related to
fingerprint identification. However, none of them take into
account everything that an examiner would consider during
the examination process and therefore each of them have
limitations. |
|
 |
 |
 |
What is certification and why is it important? |
|
 |
 |
Answer: Certification, as it relates to
friction ridge examiners, involves assessing the knowledge,
skill, and ability of an examiner to successfully complete
an examination and demonstrate competency. Those lacking
certification are not generally precluded from practicing or
working in their respective disciplines.
Certification is important because it establishes a baseline
of knowledge and allows external entities, who are not
familiar with the discipline, to be assured of the skill
level of the practitioner. The NAS report made strong
recommendations for practitioners to achieve certification.
The main external certifying body for friction ridge
examiners is the International Association for
Identification (IAI), and some agencies have internal
certification programs. |
|
 |
 |
 |
Why is SWGFAST setting standards instead of guidelines? |
|
 |
 |
| SWGFAST was originally founded as a
technical working group consisting of latent print examiners
to create consensus guidelines as best practices within the
friction ridge community. In the current climate, there has
been a call by the fingerprint community, legal community
and the NAS for more standardization. SWGFAST recognizes the
importance of laboratory compliance with minimum standards,
and is responding to this call by transitioning many of the
SWGFAST guideline documents to standards. |
|
 |
 |
 |
Is my agency required to adopt SWGFAST standards? If we
do we have to adhere to all sections of them? |
|
 |
 |
| Answer: No, because SWGFAST currently
has no enforcement authority. However, SWGFAST guidelines
and standards are widely recognized by the forensic
community, the courts, and the forensic laboratory
accrediting bodies. The U.S. Senate Judiciary Committee is
currently considering implementing recommendations within
the NAS report, including potential enforcement mechanisms
for standards set by SWGFAST and the other Scientific
Working Groups. |
|
 |
 |
 |
Are there any online references for addressing legal or daubert-like questions that might come up during testimony, and helpful answers for those questions? |
|
 |
How is the suitability of a friction ridge impression measured? |
|
 |
 |
Answering the question of suitability
requires that the purpose be defined. For example, whether a
friction ridge impression is suitable for retention as
evidence is a different question than whether it is suitable
for identification.
The question of suitability also involves a subjective
measurement of information. It is recognized that any
scientific endeavor is subject to human interpretation.
(For example, training, experience, visual acuity, talent,
external influences) In friction ridge
examination, what might appear as an objective threshold
even has subjective elements. For example, requiring a
minimum number of features to establish suitability for the
purpose of identification may appear objective, but how an
examiner defines a “feature” is still subjective. Scientific
objectivity is achieved through the reproducibility of
subjective conclusions by other examiners, within
established parameters.
See also the SWGFAST Standards for Examining Friction Ridge
Impressions and Resulting Conclusions. |
|
 |
 |
 |
|
|