MBTA say this guy is wanted for indecent assault and battery for an incident that happened last Tuesday at Park Street.
According to police, "a female victim was inappropriately assaulted" by him while they were getting on a C trolley.
He's described as 25-30. In addition to his red T-shirt, he wore a gray hoodie with black horizontal stripes, blue jeans and sneakers.
If you know him and are disgusted, contact Transit Police at 617-222-1050 or send an anonymous text tip to 873873.