The evidence was held for decades until the science of DNA developed. And the DNA sample was collected from Marise’s jacket in the 1980s.
“In 2007, our Pennsylvania State Police DNA Lab developed a suspect profile from the killer’s body fluids, which were found on Marise’s clothing,” said Trooper Anthony Petroski, “Shortly thereafter, DNA profiles were developed for all the original suspects and submitted to our DNA lab.”
The DNA sample was checked monthly, with no results.
In 2019, police released Parabon Nanolabs composite images of their suspect. Parabon uses DNA to create a composite profile. Using DNA features such as sex, skin type, eye, and hair color. The composite showed a light-skinned male with green or hazel eyes.
In 2019 Eric Schubert offered to help on the case.
Genetic Genealogy whiz kid Eric Schubert
Eric Schubert, a history major at Elizabethtown College in Pennsylvania and owner of ES Genealogy offered his services pro bono to the police. He has helped other police agencies crack their cold cases using genetic genealogy.