A former MBTA Transit Police officer was found guilty of raping two women while on duty in 2012.

A jury sitting in Suffolk Superior Court on Friday convicted Shawn McCarthy, 50, of Maine but formerly of Wilmington, of three counts of rape. He was ordered held in jail pending a sentencing hearing scheduled for Wednesday.

“This officer abused his position, violated his department protocols, and, worst of all by far, subjected two young women to sexual assaults that went unacted upon for many years,” Suffolk District Attorney Kevin Hayden said in a statement following the verdict. “But thanks to the victims ultimately coming forward, and the diligent work of investigators, justice in this case was sought and, with today’s verdict, delivered.”

Transit Police Chief Kenneth Green said in his own statement that it thanked Assistant DA Ian Polumbaum, the prosecutor of the case, for holding McCarthy “accountable for his abhorrent, predatory and vile conduct.”

“First and foremost, we must acknowledge the survivors in this horrific incident. We are in total admiration at the courage and bravery they displayed throughout this ordeal,” Green’s statement added. “The jurors rendered a thoughtful and just verdict. We are committed to restoring the faith and trust of those we are sworn to serve and protect.”

According to the prosecution, two women in their early 20s were drinking in downtown Boston when they found Officer McCarthy outside the aquarium station. Even though another officer advised McCarthy against it, according to court documents, McCarthy offered the two drunk, young women a joyride in his marked cruiser. McCarthy was uniformed and equipped with his service weapon at the time.

The woman took a ride in the cruiser as its lights flashed until one of them had to pee. McCarthy pulled over into an empty lot as a bathroom break and, according to prosecutors, told them that he wasn’t risking his job by giving this joyride for nothing. The women would have to pay up with sex.

“The women stated that they feared getting in trouble and had no choice but to submit as McCarthy subjected them to sexual acts,” according to the prosecution’s statement of the case. The document adds that he raped one of them against his cruiser and raped the other digitally in the backseat.

“He then drove them back to the area where they had met and warned them not to tell anyone about the episode,” the document adds.

One of the women soon after told a male relative what had happened to her and, in 2019, she divulged the encounter while filling out a form to get her own job in law enforcement outside of Boston.

The Transit Police put McCarthy on administrative leave as the investigation played out in December 2019 and he resigned from the agency soon after, according to the DA’s office.

A Suffolk grand jury returned the rape indictments against McCarthy on May 19, 2020, and he was arraigned on the charges two days later, according to court records.