Bullet holes, bloodstain in aftermath of Staten Island deli slaying. Defendant, 52, standing trial in 2021 case.

STATEN ISLAND, N.Y.— Crime scene investigators called to the scene of a fatal shooting two years ago inside a New Brighton deli had their work cut out for them.

Photos taken by police hours after the Nov. 21, 2021 incident showed bullet holes and shell casings in the metal frame of the front door; across the wooden shelves of the neighborhood grocer; through a wooden door leading to a rear storage room; and in a corner bathroom where the gunshots ended in what proved to be the victim’s final moments.

The man charged in the case, Anthony Fonseca, 52, of Jersey Street in New Brighton, was tracked down weeks later by authorities in Florida and indicted on murder charges. The man found by emergency responders shot five times inside the deli was 18-year-old Keondre Adams of Tompkinsville.

A jury trial commenced this week in state Supreme Court, St. George before Justice Alexander Jeong and in front of families of both individuals.

Prosecutors say Fonseca approached the teenager outside the deli at 18-20 Westervelt Avenue just before 5 p.m., firing off at least one shot outside that’s captured in a surveillance image. As the victim fled into the deli and toward the rear of the store, surveillance images show him at one point pulling out a firearm and firing back.

Prosecutors with the Richmond County District Attorney’s Office have not presented a motive in the case, relying on the surveillance footage and forensics evidence collected by law enforcement officials. At the time of the incident, a source told the Daily News the defendant, an ex-con, had targeted the much younger victim in retaliation for a prior dispute.

In the minutes before and after the shooting, several, short phone calls were exchanged between Fonseca, another person listed in his phone as “Baby Boy” and a third unidentified, 917 number, an NYPD…