An employee at the Middlesex District Attorney’s Office said they knew that a State Police officer was allegedly intoxicated during a fatal cruiser crash more than a year before the office disclosed the accusation in court, the DA revealed today.

District Attorney Marian Ryan admits that “a non-attorney employee voluntarily disclosed that sometime during the late spring or early summer of 2024, State Police Lt. Anthony Delucia mentioned that he had heard that Sgt. [Scott] Qugiley’s blood alcohol content was a .11 and that he (Sgt. Quigley) had been at ‘Teresa’s’ with another trooper prior to the crash,” the filing states.

Teresa’s is a bar near the Middlesex Superior Court in Woburn.

The revelation that Quigley may have been drunk when he crashed his cruiser into a wheelchair van in December 2023, injuring a man inside who died at the hospital a month later, came to light during a separate murder trial in Lowell.

At the time of the disclosure last month, the office maintained that they were unaware of Quigely’s alleged blood alcohol until a few days prior, and immediately notified the court and defense.

“Out of an abundance of caution, and in the interests of full transparency, on February 20, 2026, the District Attorney began the process of retaining retired Superior Court Justice Thomas Dreschler to conduct an independent investigation into this matter,” Ryan wrote in the filing.

Then on March 2, the employee disclosed the conversation with the State Police lieutenant.

Quigley had been embedded with the Middlesex District Attorney’s Office and was a key investigator in the case against the brothers Billy, Billoeum, and Channa Phan, who are on trial for the 2020 murder of Tyrone Phet.

The Phan trial was in jury selection when the OUI accusation surfaced, pausing the proceedings. Since then, the brother’s defense lawyers have filed a motion for an evidentiary hearing to put Quigley on the stand, in an effort to potentially dismiss their case for prosecutorial misconduct.

Ryan said that they would share the findings of the independent investigation with the defense and the court.

The Commonwealth is aware that “it is within this court’s discretion to decide whether an officer’s prior misconduct is a critical issue at trial,” Ryan wrote, “but contends that such information is generally not admissible for impeachment.”

This story is developing… check back for updates. 

Timeline of Mass State Police fatal cruiser crash scandal