A 22-year-old man was arrested for allegedly attacking a convenience store clerk in Lynn, Massachusetts on Halloween.

Joshua Mora appeared in court on Friday to face assault and battery with a dangerous weapon, armed robbery, malicious destruction of property and more. He pleaded not guilty as he hid behind a whiteboard in court.

The robbery happened just after 7 p.m. at the Richdale Convenience Store on Chatham Street. Surveillance video from the attack shows what Lynn Police believe is Mora hopping over the counter before beginning to attack the clerk.

"And begins to punch him multiple times in the face and head, at which point he slams him on the ground and begins to punch him repeatedly in the head," the prosecutor said in court.

The employee was taken to the hospital with "signifi

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