Updated with arrest information.
A Roxbury man was ordered held in lieu of $5,000 bail today on charges he used a special slit in his pants to masturbate and expose himself on a Blue Line train as it traveled under Boston Harbor on Dec. 24, the Suffolk County District Attorney's office reports.
Abdelhakim Rezzoug was arraigned in East Boston District Court on a charge of open and gross lewdness for the incident. A rider captured him on video as he got off the train at Airport around 5:40 p.m., MBTA Transit police say. The DA's office says that not long after MBTA police released a wanted poster, a Boston Police sergeant reported he knew that guy - he was a resident of a DMH facility.
The DA's office says Rezzoug was arrested today on the Blue Line and that he will also be charged for a similar incident earlier on Dec. 24 on the Red Line.
The video taken by a passenger: