Massachusetts Man Exonerated After Four Decades Following Decision by Suffolk County Prosecutors to Drop Murder Charges

Suffolk County prosecutors drop murder charges against Thomas Rosa Jr. after four decades. New DNA evidence and unreliable testimony led to the 100th MA exoneration.

By: AXL Media

Published: Mar 19, 2026, 5:01 AM EDT

Source: Information for this report was sourced from Boston.com

The Final Conclusion of a Forty Year Legal Battle

A marathon legal struggle that spanned four decades reached its final conclusion on Wednesday as the Suffolk County District Attorney’s Office formally abandoned its prosecution of Thomas Rosa Jr. The 64 year old Chelsea resident, who has maintained his innocence since his initial indictment in 1986, was officially exonerated after prosecutors filed documents in Suffolk Superior Court. This decision marks the end of a "nightmare" described by his legal team, confirming that the state no longer possesses a good faith basis to move forward with the charges originally brought against him for a 1985 killing.

The Collapse of the Commonwealth’s Forensic Case

The decision to drop the charges was heavily influenced by the emergence of new forensic data that contradicted the original prosecution's narrative. According to Rosa’s attorney, Radha Natarajan, scientific evidence and DNA testing conducted in recent years effectively dismantled the state's case. These findings were significant enough to lead to Rosa’s release from prison in 2020, and they ultimately forced the District Attorney’s Office to admit that changes in forensic standards and lost evidence over the last forty years made proving the case beyond a reasonable doubt an impossibility.

Challenges with Eyewitness Credibility and Reliability

A critical component in the movement for Rosa's exoneration was the systematic debunking of the eyewitness testimony that secured his 1993 conviction. According to a joint statement from the New England Innocence Project and Loevy + Loevy, the witnesses only viewed the perpetrator for less than ten seconds at night, a scenario modern research identifies as having a high risk of misidentification. Furthermore, the descriptions provided by witnesses included a distinctive gap in the assailant's teeth, a physical feature that Rosa did not have, further undermining the reliability of the original identification process.