ALFRED — A York County grand jury has handed indictments against three people in connection with an October robbery at Eastside Convenience store in Sanford.

Matthew Prior, 26, who now lists a Bath address, was indicted on a Class A felony robbery charge and a Class B theft charge.

Donna Gray, 57, who at the time of the robbery was a longtime Sanford Public Works employee, was charged by the grand jury with Class C hindering apprehension, as was her daughter, Jenna Gray, 24. Both are of Sanford. The pair had originally been charged with robbery by police.

Prior was arrested four days after Eastside Convenience store, located on High Street, was robbed by a man armed with a handgun on Oct. 11. The robber was disguised with an orange knit hat pulled down over his head, with cutouts so he could see.

Neither store personnel nor customers were hurt. The robber made away with cash; police wouldn’t say how much was taken.

There were numerous witnesses to the robbery, as well as Prior’s alleged exit from the store. He was reportedly hit by a car chasing him through Carpentier Park before getting into a white sedan parked on North Avenue that police say was driven by Donna Gray.

Later that day, Prior was treated for an injury to his leg at Frisbie Memorial Hospital in Rochester, New Hampshire, about 15 miles from Sanford.

In an interview with police in the days following the robbery, Donna Gray allegedly told police she believed Prior was injured at his job, and she drove him to the hospital for treatment in the early morning hours of Oct. 12.

She also claimed she hadn’t driven in the area of Eastside Convenience store on the day of the robbery, but later said she had been on North Avenue, which is nearby, according to a police affidavit.

According to the affidavit, Jenna Gray told police she hadn’t been in the area of the convenience store that day.

Prior confessed to the crime, according to an affidavit filed by Sanford Police Detective Eric Small. Prior allegedly told police he was driven there by someone whose name he did not disclose, telling them he wanted to visit a friend.

He told police the driver didn’t know he was planning a robbery, and that he had a heroin addiction, according to the affidavit.

Donna Gray, who had been an assistant to the city’s public works director for many years, was placed on administrative leave from her job immediately following her arrest. She resigned a few days later.

Robbery is a Class A felony, and carries a maximum penalty of 30 years in prison. A Class B theft charge carries a maximum prison term of 10 years. Hindering apprehension is a Class C felony, and carries a maximum prison term of five years.

— Senior Staff Writer Tammy Wells can be contacted at 324-4444 (local call in Sanford) or 282-1535, ext. 327 or [email protected].