A man killed last week on Georgia Avenue — known by his Shepherd Park neighbors for having lived in a trailer — was shot in the head by a man who may have just smoked drugs, according to court documents filed Monday.

D.C. police described the shooting in an affidavit supporting a charge of first degree murder while armed against the suspect, Arik A. Sims, 24, of Northwest. Police said the shooting was unprovoked and came after the victim and suspect had what was described as a “non-hostile” conversation. Sims was arrested Saturday.

The 2:30 a.m. shooting in the 7400 block of Georgia Avenue NW sparked community interest, particularly among residents of Fern Street, where the victim, 29-year-old Lamar Fonville, had lived in a trailer behind a friend’s house.

The court documents state that a key witness told police that the suspect had smoked a joint — though they don’t describe what it contained — and had been talking with Fonville on Georgia Avenue when “without provocation” he saw the man “pull from his waistband a firearm and fire multiple rounds.” Police said the victim was hit once in the head and pronounced dead at the scene.

Fonville’s brother, 37-year-old Carlton Fonville, said Lamar Fonville had just moved out of the trailer and into an apartment. He was shot outside that apartment.

He said the two were in regular contact and that Fonville had recently been taking classes at the University of the District of Columbia. “He was trying to become a lawyer,” the brother said. A spokesman at UDC confirmed that Fonville had been enrolled.