Category Archives: DNA mixtures

Making Sense of DNA Genetics – #AAFS2017 – Epigenetics is mentioned

This is a primer-level (being in a brochure format) look on the subject and has some gaps as far as interpretation of DNA partial profiles and mixtures but admits that, even with algorithmic software, there still is human interpretation in … Continue reading

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When flies besmirch the crime scene, this might avoid DNA mistakes

Interesting look at separating fly DNA from human DNA at a messy crime scene. Hopefully the fly crap can be separated out after the research is completed. There are cases where flyspecks (regurg and poop) are mis-identified as blood spatter and … Continue reading

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Prosecutors started to look at Austin PD DNA analyst 6 years ago

Its better late than never, I guess. Good example on how DA CIUs (conviction integrity units) get a bad rap. This Cleveland DA says some of them are just ‘news releases.’ “During that sexual assault trial, prosecutors wrote two memos … Continue reading

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American Academy of Forensic Sciences asks public for bitemark validation studies

In an equitable move [probably in the face of all the LEO crime labs complaining] requested by the President’s Council of Science and Technology chairman, Eric Lander, the AAFS is asking its membership to provide more information not mentioned in … Continue reading

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Comparing DNA mixtures with Trueallele and STRmix gets mixed results

Where Traditional DNA Testing Fails, Algorithms Take Over Powerful software is solving more crimes and raising new questions about due process. [excerpt] Studies have only established the validity of the available software in certain circumstances (such as a DNA mixture … Continue reading

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Controversial use of familial DNA searches helps lead to finds in cold cases

A broader look at familial DNA use within criminal investigations. Some good, some bad. What appears in all examples, is that ‘presumptions’ of guilt can be incorrect and send prosecutors off in the wrong direction. What’s also apparent is that … Continue reading

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Messed up DNA testing fixed after 24 years in prison; Lazy ballistics

Wisconsin man exonerated and released from prison after 24 years after Milwaukee County District Attorney’s Office found lab analyst made errors in original 1992 DNA analysis report (Milwaukee Journal Sentinel) A new study shows that PredPol, a predictive policing software … Continue reading

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When crime labs go rogue. Safety suffers. Honesty seems more doubtful.

Max Houck (@maxmhouck) used to run the Washington DC Forensic Science facility which then boasted as being “independent” a la Houston’s Forensic Science Center. Above is his Twitter response to and post about police managers refusing an open and transparent scientific … Continue reading

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DNA “falsifiability” gets some airtime, CRIME LAB chaos in MA, “vigorous debate’ in SBS

The latest in scientific quandaries within forensics from the NY Legal Aid Society Newsletter. Fool’s Gold: Legal Aid Society DNA Unit featured in Atlantic Magazine article about the increasing use of unreliable DNA “science” in the criminal justice system DNA … Continue reading

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FBI DNA software revamp falls onto each US state to review past convictions

This article contains a broad spectrum of conflicting statements about how serious the “DNA software caused recount” will effect past cases. Of course, the law enforcement side estimate seems confident no major retrials will occur. That’s not what is happening … Continue reading

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