The suspect's name is Daron Nickens, and Arlington police stopped him in a campus parking lot Wednesday afternoon.
Campus police were then able to positively identify him from surveillance video of an incident.
Nickens is charged with offensive or provocative contact and an unrelated traffic offense.
Witnesses say around 5 p.m. Tuesday, Nickens slapped a woman's behind in the Heights on Pecan apartment complex parking garage.
Minutes later, police say a man matching the same description exposed himself to a woman on South Pecan Street.