Showing posts with label CODIS. Show all posts
Showing posts with label CODIS. Show all posts

Friday, November 4, 2016

Ambiguity Mars The Jane Mixer Case

Forty-eight years after the murder of University of Michigan coed Jane Mixer, a University of California San Diego professor believes the man convicted of the crime--Gary Earl Leiterman--may be innocent. After consulting with six DNA experts, Distinguished Professor of Psychology John Wixted has written an article in this month's Association for Psychological Science Observer in support of his belief that contaminated DNA evidence convicted the wrong man.

In 2005, Gary Earl Leiterman was identified through DNA analysis as Mixer's assailant in her March 20, 1968 murder. Mixer's presumed murderer, long held by the public to be John Norman Collins, was exonerated by default when Leiterman was convicted of Mixer's murder thirty-six years after her death. 

Perspiration stains found on a nylon stocking tied around Mixer's neck were examined for DNA. The FBI using their CODIS (Combined DNA Index System) database came up with a direct hit on Leiterman. Complicating the DNA evidence in this case was a spot of blood found on Mixer's hand. It matched the blood of John Ruelas, who was only four years old at the time. 

The obvious contamination at the crime lab did not sway the jury. They found Leiterman guilty of murder in the first degree after deliberating less than three hours. Since his incarceration, Leiterman has been proclaiming his innocence because of irregularities at the crime lab where the Mixer forensic analysis was done.
 
Professor Wixted believes Collins may still be the prime suspect in Jane Mixer's murder. He believes there is compelling evidence pointing to Collins's involvement--though there is no hard evidence to support that finding. Leiterman hopes he and his lawyer can get a new trial clearing him of the crime after serving over ten years of his life sentence.

Giving Leiterman hope are updated FBI standards and protocols for DNA labs (Quality Assurance Standards for Forensic DNA Testing Laboratories) effective September 7, 2011. Of its seventeen provisions, #7 Evidence Control, #9 Analytical Procedures, and #14 Corrective Action look the most promising for Leiterman's defense. The new provisions were tightened to ensure the quality and integrity of DNA data generated by these labs. Had these protocols been in place during the Leiterman trial, it is doubtful the DNA evidence would have been admissible in court. What that means for Leiterman's future is yet to be determined.

Professor Wixted's article: http://www.psychologicalscience.org/publications/observer/2016/nov-16/whether-eyewitness-memory-or-dna-contaminated-forensic-evidence-is-unreliable.html

Saturday, July 21, 2012

Rendezvous with Death - Part Three


Since the 1980s, law enforcement experienced a gradual decline in the number of violent crimes in the United States. In 2003, the U.S. House of Representatives authorized one billion dollars to use DNA to reduce the huge backlog of cases that had gone cold. Two retired Michigan State Police Detectives volunteered to look into the Michigan Coed murders of the late 1960s.
 
In 2004, the Michigan State Police ran DNA samples from at least two of the murdered Michigan coeds through the FBIs Combined DNA Index System (CODIS). The third young woman John Norman Collins allegedly killed in the series of seven sex slayings attributed to him was twenty-three year old, Jane Mixer, a graduate law student at The University of Michigan.

Even though a few investigators most familiar with these cases felt from the start that Jane's murder was characteristically different from the two previous murders, she was included in the unsolved coed murder cache. Thirty-five years later, a DNA analysis of her pantyhose revealed copious amounts of perspiration on them that wasn't from Jane. DNA was extracted from the sweat cells and run through the FBI's CODIS database.

The first run through the system produced a "cold" hit on a retired male nurse who had been convicted on a prior fraud charge for writing bogus prescriptions. He was entered into the CODIS system at that time. Gary Earl Leiterman, dubbed by the local press as "The Elmer Fudd Killer," was found guilty of the murder of Jane Mixer. John Norman Collins was cleared.

Since DNA scientific evidence is considered so strong in court, many cold cases have been solved in the thirty years since it has been introduced as an effective crime fighting tool. Many guilty parties have been brought to justice, while some of the innocent have been exonerated of their crimes after years of unjust imprisonment.

It should be noted that John Norman Collins has refused DNA testing, which could prove him innocent of the murders he has steadfastly claimed he is innocent of committing for the last forty-five years. Even John's supporters must find that curious. Seems to me if he had a "Get Out of Jail" card, he would have gotten his ticket punched years ago.

(To be continued...)

http://www.murderpedia.org/male.L/l/leiterman-gary-photos.htm