He grabbed her by the shoulder and struck her in the head, she told BSO, and when she saw he was holding a handgun, she started screaming. Those screams were caught by surveillance cameras.
The woman managed to break free from his hold and run away, investigators said. The man took the woman's purse and is seen running away in the surveillance footage.
The footage doesn't capture the actual crime but did capture a man loitering in the area before the attack. That man matched the description of the robber, investigators said.
He was described as a slim build male subject, possibly between 18 to 25 years of age, and approximately 6 feet to 6 feet 3 inches tall and wearing all black.