The Fairfax County groper grabbed a 10th victim Monday evening.
The latest incident happened about 6 p.m. in the 7200 block of Commerce Street in Springfield, Va.
The victim was walking near an apartment complex when she was approached from behind and grabbed, police said. She turned to look and the man fled on foot.
Police said they believe the same man is responsible for nine similar incidents.
He was wearing a dark hooded sweatshirt and jeans.
Police canvassed the area but did not find the man.