TrueAllele solves uninterpretable DNA in mother and daughter double homicide

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United States v Curtis Johnson, Jr.

TrueAllele connects a suspect to bandana

Crime On December 18, 2013, a group of men were involved in a robbery of an armored truck outside of a New Orleans bank, killing the truck guard in a shootout.
Evidence A bandana was collected as evidence.
DNA The Louisiana State Police crime lab created DNA mixture data from the weapon.
Match Due to the limited nature of the DNA data profile, the lab was not able to fully interpret the mixture.
TrueAllele The computer found that a match between the pistol and a defendant, Curtis Johnson, Jr., is 200 times more probable than a coincidence. The error rate for this match statistic is 1 in 4,100.
Cybergenetics    On July 14, 2021, TrueAllele withstood an admissibility challenge before the evidence was presented to the jury. Then, Chief Scientist Dr. Mark Perlin and DNA analyst Jennifer Bracamontes testified before a federal court jury about the TrueAllele results. This trial resulted in a hung jury. Analyst Bracamontes testified again on March 29, 2022.
Outcome On March 31, 2022, Johnson was found guilty as charged of conspiracy, obstruction of commerce by robbery and murder, and violating the Federal Gun Control Act. He was sentenced on July 13, 2022 to 50 years in prison.

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