AUBURN – A man outed by police last week as a violent sexual predator remained behind bars on an unrelated charge Sunday night.

Ronald J. Leno, 56, was being held in lieu of $2,500 bail at the Androscoggin County Jail. He was arrested Saturday night, charged with aggravated assault, according to jail records.

County sheriff’s Detective William Gagne earlier referred questions about Leno’s arrest to state police, but the trooper handling the case was off Sunday and couldn’t be reached.

A critic of Leno’s, however, offered one account. state Rep. Mike Vaughan, a Durham Republican, said Leno was driving by a home in Durham when he noticed a flag of Texas flying in the yard. Vaughan said Leno stopped to speak with a woman when her husband approached and told Leno to leave.

Leno then beat the man with a steel rod, Vaughan said.

Vaughan has been asking state officials how they allowed Leno to move into Durham without requiring sexual offender notice. He said people also want to know why the man convicted of multiple sexual assaults in Massachusetts could live unnoticed in the town and obtain a Maine drivers license.

Police warned people that Leno was living in Durham last week, the same time they made public his prior conviction record. Police said he had been under their radar until he had a recent runin with police in Brunswick after a woman filed a complaint there.