“We are unsure if any of those were the syringe in question,” police told the station in what they said was an update to their initial statement. They say the victim is still undergoing testing.

“We need to find out … what this victim is up against, if she was stabbed with one of those semen-filled syringes,” Anne Arundel County Police Sgt. Jacklyn Davis told the station.

Security footage shows the moment when Stemen allegedly stabbed the victim, Katie Peters, with a syringe at the entrance to Christopher’s Fine Foods in Churchton, Md.

In the video, Peters pushes a shopping cart into the store and returns it to the lineup of empty carts, seemingly unaware of the suspect following a few paces behind her. He can be seen holding a cylindrical object in one hand. The suspect walks behind Peters, pivots and appears to jab her in the buttocks with the object, which police say was a syringe.

Peters can be seen jumping as though she’s been stung. She says she let out a yelp after the attack, which she initially thought was from a lit cigarette.

“He turned to me and said, ‘I know it feels like a bee sting, doesn’t it?’” Peters told WJZ.

She says she felt discomfort shortly after the incident and found a puncture wound on her behind.

“I started driving home [and] it started hurting really bad,” she told WJZ. “I called my son and said, ‘Something’s not right. I hope nothing happens. I hope I make it home. I love you.'”

Peters says she went through several days of fear and uncertainty while she waited for police to find out what she’d been injected with.

Police recovered a syringe full of semen from the suspect’s car, WBAL TV reports.

Authorities have not indicated whether the syringes were filled with Stemen’s semen.

He is being held without bail at the county jail, records show. Stemen is scheduled to appear in court on Monday.

The investigation is ongoing.