Police are still searching for the serial mugger who stabbed a woman when she refused to give up her purse at an Upper West Side subway station last week. Surveillance video of the thief was released today (you can see it below). Police are now crediting the perp with robbing three different women this summer at knife-point.

The suspect, described as a black male in his 20s, was caught on camera robbing a 37-year-old woman on Aug. 7, at the 125th St. station in Harlem; he robbed a 28-year-old woman leaving the Dyckman St. station on Aug. 27. He didn't stab either of the women.

The woman who he did stab last weekend refused to let go of her purse, unlike the other women. She told reporters that she just really really wants her purse back. We all know there are stiff penalties for purse snatching nowadays, since the landmark case of Dunst v. some dude who stole her assistant's bag.