Convicted sex offender charged with grabbing woman on a Red Line train

Transit Police report arresting a man on a charge of indecent assault and battery for an incident on an inbound Red Line train shortly before it arrived at Charles/MGH around 7:45 p.m. on Monday.

Police say Christopher Nettles, 46, of Dorchester, attacked a woman on the train. She managed to exit the train at Charles/MGH and reported the incident to police, who had the train held, the doors closed, at Park, until officers could arrive and nab Nettles. He was brought back to Charles/MGH, where the victim identified him and he was arrested, police say.

Nettles was already wanted for failing to register as a sex offender for his conviction in April, 2018 on the same charge, according to the state Sexual Offender Registry Board.

Innocent, etc.