Breaking NEWz you can UzE...
compiled by Jon Stimac
Web Chat Fingerprint
Identification: The Role of Research in Fortifying the Forensic
Thursday, May 10
...an expert panel to discuss various topics - sponsored by the
Government Innovators Network and the National Institute of Justice...
Judge Accepts Evidence of Dina's Fingerprints –
INDEPENDENT ONLINE, So AFRICA -
2007 ...judge has accepted evidence that two
thumbprints were found on the back of a courier waybill...
Last of Six McKie Case Experts Sacked
– HERALD, UK
- May 3, 2007
...the 22-year veteran was told to leave after refusing to accept a
move to a different post for less than half her salary...
Prints Link Chicago Man to 6-month-old Burglary
NORTHWEST HERALD, Il
2007 ...more than six months ago, someone crawled through a
basement window well and into a house...
Recent CLPEX Posting Activity
containing new posts
Moderated by Steve Everist
Not so good news out of Florida
Jessica Janisch Mon May 07, 2007 3:39 pm
Point Of View: Point Counters and Pseudoscience
Charles Parker Sun May 06, 2007 6:38 am
Steve Skowron Fri May 04, 2007 10:00 pm
McKie's facing court appearance?
Daktari Fri May 04, 2007 6:45 pm
Mass Supreme Judicial Court on Amicus Briefs
L.J.Steele Thu May 03, 2007 8:48 pm
FinePix S3 Pro UVIR Digital Camera
Dan #845 Thu May 03, 2007 5:43 pm
Epic Struggle -- Science versus Dogma
Pat A. Wertheim Thu May 03, 2007 3:43 pm
Interesting fingerprint article
H. B. James Thu May 03, 2007 3:22 pm
CA Development "Signature"
Terry A. Smith Wed May 02, 2007 9:55 pm
The CSI's conundrum of the day
David Fairhurst Tue May 01, 2007 10:21 pm
[ Poll ] Pay Parity
sorbitol Tue May 01, 2007 8:08 pm
Thank GOD for stupid crooks!
Cindy Rennie Mon Apr 30, 2007 8:14 pm
UPDATES ON CLPEX.com
updates on the website this week.
we completed a series on U.S. patents related to
latent print examination.
we view a few noteworthy
news related fingerprint items.
Fingerprint Identification: The
Role of Research in Fortifying the Forensic Sciences
Thursday, May 10 at 2:00 p.m. EDT
Free online event. Registration required.
Fingerprint technology is improving rapidly. It is also more cost effective
than DNA but is vastly underutilized.
This event, sponsored by the Government Innovators Network and the National
Institute of Justice, assembles an expert panel to discuss the following
* What are the barriers to maximizing the usefulness of fingerprints?
* What does it take to be a good fingerprint analyst?
* How do we better share AFIS (automated fingerprint information system)
* What are the emerging practical techniques and improvements?
View the panelists and register
The FBI Criminal Justice Information Services (CJIS) Division will be
hosting the next Tenprint and Criminal History Record Training "Chat" style
Training Session via Law Enforcement Online (LEO) on Wednesday, May 9, 2007,
at 2 p.m. (EST). The topic will be "The Importance of Tenprint Cards."
This session will be moderated by the Identification and Investigative
Services Section's (IISS) Training and Records Tesimony Team (TRTT). For
any questions regarding the content of the Chat Session, please contact Ms.
Nikki Hermosilla of the TRTT at (304) 625-3541. For help setting up the
Chat or connecting to the Session, please contact the LEO Help Desk at
Please disseminate this email to anyone you believe may benefit from this
New Ultrasound Fingerprint Identification System Suggested
Science Daily — Diagnostic 3D ultrasound of fingers could be used for
biometric identification based on matching paired images using internal
fingerprint structures that would be difficult to fake, offering the
possibility of a unique automated fingerprint identification system,
according to a new study by researchers from the University of Michigan in
For the study, 3D images were collected of the fingers of 20 volunteers. A
group of four readers, including two musculoskeletal radiologists, then
attempted to match the pairs based on anatomic and physiological features of
the human finger. Radiologists matching the image pairs were 100%
successful, and the average success of all four readers was 96%.
"The purpose of the study was to evaluate whether the use of internal finger
structure as imaged using ultrasound could act as a supplement to standard
methods of biometric identification. Also, this study provides a way of
assessing physiologic and cardiovascular status, for example, whether the
person is alive or not, which is not known from just their external
fingerprints. There is a wide range of applications for an inexpensive
ultrasonic fingerprint reader, including widespread use in cell phones,"
according to Ganesh Narayanasamy, PhD candidate in Applied Physics and lead
author of the study.
Besides its many possible biometric identification uses, the findings also
have a medical application, say the authors. "This could become a method of
patient identification and even continuous physiologic monitoring. The
techniques should become useful for other types of musculoskeletal
ultrasound and for monitoring of arthritis treatments," said Dr.
The full results of the study will be presented on Monday, May 7 during the
American Roentgen Ray Society Annual Meeting in Orlando, FL.
Pointing the finger
[April 23, 2007]
Article by Steve Down
Law enforcement officers have been supported by forensic science for decades
and new techniques appear with heartening regularity to help the fight
against crime. Advances in the analysis of inks help to trap forgers and
counterfeiters, improved image enhancement techniques provide better details
from footprints and impressions, and skilled computer technicians can
extract "lost" information from personal computers.
But one technique that has completely revolutionised forensic science is DNA
testing, due to its remarkable ability to place one person at a crime scene
with absolute certainty. This is guaranteed by the practically unique nature
of an individual's DNA compared with all others. Before DNA technology was
developed, the closest tool that forensic technicians had was fingerprint
analysis. Fingerprints, too, are unique, but they have a distinct
disadvantage compared with DNA.
Fingerprints can degrade with time, so that some visualisation methods are
less effective than with fresh prints. Since many crimes go undetected for
some time, or evidence is recovered at a later date, the degradation of
prints can become an important factor. The characteristic ridge pattern may
not reproduced with sufficient accuracy for a positive identification.
Fingerprints consist of a mixture of substances released from the skin
glands, including lipids, amino acids, salts and water, complemented in some
cases by environmental components. It is known that lipids oxidise fairly
readily and chemists from the Department of Forensic Science and Drug
Monitoring, King's College London have previously shown that one major lipid
component, squalene, is depleted quite rapidly after a print has been
Now, these chemists, led by Sue Jickells, realised that the chemical changes
that reduce the amounts of squalene would form new products that are
potential candidates for a new type of fingerprint visualisation agent. If
the products could be identified and a visualisation agent developed, it
might be possible to estimate the time elapsed since a fingerprint was laid
In initial studies, the researchers oxidised squalene in solution using the
photooxidising agent Rose Bengal. The reaction mixture was analysed by
semi-preparative HPLC with UV detection, which revealed the presence of
several products. Subsequent analysis by TLC and mass spectrometry with
electrospray ionisation (ESI) and atmospheric pressure chemical ionisation (APCI)
confirmed the formation of squalene oxide and the hydroperoxides from
squalene mono- to penta-hydroperoxide.
Squalene is a multi-branched hydrocarbon
(2,6,10,15,19,23-hexamethyltetracosane) so there are several potential sites
at which oxidation can occur to give these multiply substituted products.
For further studies, APCI MS was preferred as it gave more consistent
formation of sodium and potassium adducts and better ionisation of squalene
itself. The team went on to develop an HPLC/MS method with APCI for
analysing the oxidation of squalene in solution and in latent fingerprints,
that is, prints invisible to the naked eye.
In the absence of Rose Bengal, squalene in solution was still oxidised
quickly, with only 3% remaining after 2 days in a 24-h light room and less
than 1% left after 15 days. The fact that squalene epoxide and mono-hydroperoxide
were also observed in the starting solution confirmed the ready oxidation of
squalene. After 20 days, even though squalene was no longer detectable, the
higher hydroperoxides were still present. If this behaviour was reproduced
in real fingerprints, then the hydroperoxides represent targets for
Fingerprints from a volunteer were deposited on a glass coverslip after the
subject ran the fingertips across the face and through the hair. They were
stored in a light room and sampled for up to 7 days. The lipids were
extracted with acetonitrile and the oxidation products analysed by HPLC/MS.
Oxidation was again rapid, with squalene epoxide and mono-hydroperoxide
increasing after one day, levelling off after 1-5 days and becoming almost
undetectable after 7 days. Oxidation was faster in real prints than in the
test solutions and Jickells attributed this to the starting concentrations
of squalene which were around 100-fold higher in solution than in prints.
The lower levels of squalene in the prints were depleted quicker, after
which no oxidation products could be formed.
The higher hydroperoxides were not measured in the prints, but comparison
with the solution studies indicates that they would be formed and might
persist after the squalene had all been lost.
The results suggest that squalene hydroperoxides should be investigated
further as targets for new fingerprint visualisation reagents. They might
prove useful for older prints, especially if it is found that the higher
hydroperoxides have lifetimes in the region of 20 days or more, as in the
Apparently, it is often the case that a suspect is placed at a crime scene
by fingerprint detection but claims to have been there before the criminal
act took place. If the kinetics of squalene oxidation were taken into
account, it might also be possible to age the fingerprints and prove or
disprove a suspect's claims.
Department of Forensic Science and Drug Monitoring, King's College London
Analytical Chemistry 2007, 79, 2650-2657: "Identification of oxidation
products of squalene in solution and in latent fingerprints by ESI-MS and
Article by Steve Down
The views represented in this article are solely those of the author and do
not necessarily represent those of John Wiley and Sons, Ltd.
Link to full article:
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