2015-07-17
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Identity crisis
As a result of such doubts, the use of some forms of forensic evidence has been suspended. In January a New York judge threw out evidence obtained from mixed DNA analysis, where two profiles are extracted from one sample. The FBI has abandoned the use of gunshot residue. Skepticism has grown in other countries, too: the Netherlands has given up the use of handwriting analysis, for instance.
2015-07-17
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Trace DNA Hair Samples Getting Cheaper and Faster, Researchers Say
A method to get DNA profiles form human hairs could improve criminal forensics, according to a new study by University of Adelaide researchers. The trace amount of DNA in hair follicles – which are often severely dehydrated when shed – can now effectively be analyzed without hugely time-consuming and expensive laboratory analysis, according to the study published in the journal Forensic Science, Medicine and Pathology.
2015-07-14
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Ultrasound sensors dig deeper into your fingerprints and fat
This new device scans a fingerprint by releasing pulses of ultrasound that bounce off the fingertip’s skin, creating an echo. It takes more time for sound waves to reflect off the valleys of a fingerprint versus its ridges, allowing the device to pinpoint and paint a picture of the crevices. However, some of the ultrasound waves also penetrate through the outer skin layer — the epidermis — reaching the inner layer called the dermis.
2015-07-14
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Pathologist with problematic record 'un-appointed' as associate state medical examiner
As a forensic pathologist, Bennett testifies as an expert witness in wrongful death cases on behalf of automobile manufacturers. James Butler of Butler, Wooten, Cheeley and Peak took the deposition after hearing Bennett testify multiple times. "He hires out to the automobile companies all the time. He comes up with this bogus theory about how somebody who got killed didn't suffer at all," Butler said. Other medical professionals discredit him, and the literature contradicts his theories, Butler said. The lawyer said he had grown tired of the sham. "I just got to the point where what Bennett does was offensive, you know?" Butler said.
2015-07-14
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Man exonerated of rape after DNA 'match' turns out to not be his
Jeremy Gatzke's life was shattered after being arrested for raping an Albuquerque woman, being labeled a sexual criminal and being stuck behind bars pending his trial. But the DNA meant to convict him wasn't his, and if it hadn't happened to him, it very well could have happened to you. "Hell" is how Gatzke describes the last two years of his life. He spent 14 months awaiting a chance to defend himself against what seemed indefensible. His wife left him, he was labeled a monster. But he wasn't one.
2015-07-14
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Cuyahoga County Medical Examiner chemist fired over botched test, county retests hundreds of samples
The medical examiner's office tests drug, blood and tissue samples and conducts autopsies for Northeast Ohio police departments in criminal cases and accidental deaths. Officials in the office have reviewed 673 cases that Sran processed since Dec. 1, 2014. They found errors in 27 of those cases, medical examiner's spokesman Christopher Harris said.
2015-07-10
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RESEARCH SHOWS FINGERPRINT ACCURACY STAYS THE SAME OVER TIME
Fingerprints have been used by law enforcement and forensics experts to successfully identify people for more than 100 years. Though fingerprints are assumed to be infallible personal identifiers, there has been little scientific research to prove this claim to be true. As such, there have been repeated challenges to the admissibility of fingerprint evidence in courts of law.
2015-07-07
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Too Much Touch DNA Evidence Overwhelms a Texas County Crime Lab
Touch DNA testing has proven increasingly effective in solving and prosecuting crimes, from homicides to burglaries, where murderers and thieves leave skin cells on weapons, walls and tools. But it’s almost too much of a success in places like Harris County, Texas – where the total DNA testing caseload has nearly doubled in about five years. Now the county’s crime lab is suspending use of touch DNA samples when it comes to property crimes. The success has been striking. Some 800 “hits†have been reached through the property-crime samples since 2008, leading to many prosecutions, Kahn said. “The CODIS results are overwhelming,†he said.
2015-07-06
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Problems with using CDs/DVDs to store digital evidence
There are many evidence related and technical problems with using CDs/DVDs to store your digital evidence data, if you haven’t experienced any of these issues yet, consider yourself lucky. A few of these problems are:
2015-07-06
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New method could help estimate time of death for a ten-day-old corpse
Despite the value of this information, it is currently not possible to estimate time of death in a reliable way after about 36-72 hours. But now a new test for calculating the exact time of death after as many as ten days has been developed. However, the method, which works by tracking the degradation of protein in muscles, has only been tested in pigs so far.