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FLATBUSH, Brooklyn — A man suspected of fatally shooting a Brooklyn deli worker in the head was a regular at the bodega who was known to the owner and employees, law enforcement sources told PIX11 News on Wednesday.

Officers were called to the bodega on Flatbush Avenue at the corner of Caton Avenue in Flatbush just before 7:35 p.m. on Tuesday.

Update: Police released new images of a man sought in connection with this homicide Wednesday night. Click here for the latest on this story.

Fadhl Moosa, 20, was found unconscious and unresponsive with a gunshot wound to the head, police said. He was pronounced dead at the scene.

Police had said the shooting was related to a robbery. Law enforcement sources told PIX11 News that workers at the deli had given the suspected gunman a free sandwich shortly before the shooting, but he kept coming back to harass the employees. The dispute then escalated and Moosa was shot, the sources said.

After the man shot Moosa, he took an unknown sum of money from the register, police said.

Surveillance video released by the NYPD shows a man running down the street with money seemingly falling from his pockets.

Update: Police released new images of a man sought in connection with this homicide Wednesday night. Click here for the latest on this story.

A man was taken into custody overnight, but was later released, police said Wednesday night.

Submit tips to police by calling Crime Stoppers at 1-800-577-TIPS (8477), visiting crimestoppers.nypdonline.org, downloading the NYPD Crime Stoppers mobile app, or texting 274637 (CRIMES) then entering TIP577. Spanish-speaking callers are asked to dial 1-888-57-PISTA (74782).