Recovered DNA crucial to making arrest in Jupiter case

DNA from multiple individuals was found found on a glove, a sweatshirt, and a rifle. Steward's DNA, Vasata's DNA, and DNA from a third unidentifiable contributor.

"And if there is an indication that there's an unknown contributor, someone will always point to that as the true criminal, the defense attorney is always going to point at that as the real perpetrator," said Tiffany Roy.

Roy is a DNA expert, formally a chemist for Massachusetts State Police. She is often called to testify, and she teaches courses in forensic science.

She says even though the unidentifiable DNA exists in small amounts on the physical evidence, it is very problematic for prosecutors.

"Mixed evidence like this is very difficult to interpret," Roy said.

We asked Jupiter's Chief why says this case is now closed. Here's his answer:

"Based on the number of distinct profiles in this case, and based on the evidence, that we have, we are confident that we have made the appropriate number of arrests."

But police documents show, Charlie Vorpagel's initial statements to police indicated he thought there were three to four masked gunmen.

Today, we asked police for further comment about the unidentifiable contributor. They say this is now in the hands of the state attorney.

"[The unidentified DNA] doesn't tell me a whole lot, there could be more people involved, there might not be, there's no way to know that from the scientific evidence based on some of the variables," Roy said.

Deputy AG Announces New Forensic Science Working Group but Still Doesn't Grasp the Extent of the Problem

I agree with everything in this article. We need to redefine accreditation in this country. Crime Labs need more independent oversight to determine the sufficiency of the procedures we have in place. We must demand this as a community.

https://www.washingtonpost.com/news/the-watch/wp/2017/08/07/deputy-ag-announces-new-forensic-science-working-group-but-still-doesnt-grasp-the-extent-of-problem/?utm_term=.571fa4bfd740#comments

Attorney General Requests Public Comments on Improving Forensic Science

DEPARTMENT OF JUSTICE

Notice of Public Comment Period on Advancing Forensic Science Docket No. OLP 160

AGENCY: Department of Justice.

ACTION: Request for public comment. NOTE: This is an advance copy of a notice submitted to the Federal Register. This document contains unofficial text. The official text will be published in a forthcoming edition of the Federal Register and posted on www.regulations.gov.

SUMMARY: It is the Department’s mission to ensure public safety and provide federal leadership in preventing and controlling crime. Advancing the practice of forensic science is an important part of that effort. The more effective a forensic system we have, the better equipped we are to solve crimes, more swiftly absolving the innocent and bringing the guilty to justice. The second term of the National Commission on Forensic Science (NCFS) is set to expire on April 23, 2017. As part of the Department’s continued efforts to advance the practice of forensic science following NCFS’s expiration, the Department is seeking comment on how the Department should move forward to (1) evaluate and improve the underlying science of forensic evidence; (2) improve the operational management systems of forensic science service providers; and (3) improve the understanding of forensic science by legal practitioners. DATES: Written public comment regarding the issue for comment should be submitted through www.regulations.gov before June 9, 2017.