“I did it, and I liked it,” accused Green Line groper Bill Carlyle muttered late last night to a Revere teen who felt her posterior plucked on the MBTA Copley Station platform.

But when his alleged victim, 19, balked at having her fanny fondled, Transit Police say Carlyle, 52, assured her, “You will never see me again, so what does it matter.”

He was wrong.

Carlyle, of Roxbury, wearing glasses and toting a duffel bag, was arrested just after 10 p.m. by officers Aldo Bido and Terence Leonard Jr. for indecent assault and battery.

Just one day after renewing their effort to fight sexual harassment on T trains and buses, Transit Police also arrested James Williams of Chelsea yesterday in connection with an early morning June 26 incident at Quincy Center Station.

A 29-year-old woman told police a tall, lanky man with long black hair and a full beard - who police now say was Williams - grabbed her buttocks, then verbally harassed her all the way to Downtown Crossing in Boston.