A Maryland man charged with poking a woman in the rear end with a syringe was found in possession of syringes containing semen when he was arrested, according to police.

Thomas Stemen, 51, is facing assault and reckless endangerment charges in connection with a February 18 incident at a grocery store in Churchton, a community about 40 miles from Baltimore.

Police allege that Stemen approached the victim from behind as she was returning a shopping cart. Surveillance video shows Stemen jabbing something at the woman, who recoils in pain. Stemen then can be seen placing an item in a pocket of his hoodie.

After cops released surveillance images, tips from the public helped them identify Stemen as the stabbing suspect.

Katie Peters, the woman attacked last week, lives near Stemen’s Churchton residence. Peters told police that, after being jabbed, she asked Stemen whether he had touched her with a lit cigarette, according to statement of charges filed in court. Peters said Stemen replied, “Yeah, it felt like a bee sting didn’t it.”

When he was apprehended earlier this week, Stemen (seen at right) was carrying one syringe, while a second needle was found in his car. Police today announced that the seized syringes contained semen, the source of which may be determined via additional testing.

Investigators are unsure if the syringe used in the February 18 stabbing was one of the two confiscated at the time of Wednesday’s arrest of Stemen (who is locked up without bond).

An examination of other surveillance footage showed Stemen unsuccessfully trying to stab two other women, say detectives who believe that “there may be additional victims who have yet to report similar incidents.”

Stemen, who is scheduled for a March 25 preliminary hearing, is in the midst of divorcing his wife, according to court records.