A man who arrived at San Francisco General Hospital with gunshot wounds he claimed were sustained in the city might have been fibbing, as police say they believe he was actually injured during a fatal altercation at a Sacramento Home Depot.

53-year-old Walter Michael Gibson was killed in front of Sacramento's Natomas Marketplace Home Depot at 8:30 Monday night, according to Fox40.

At least four shots were fired, in an attack that Sacramento PD Officer Justin Brown said "does not appear to be a random shooting." “Based on the evidence, it’s related to narcotics, specifically marijuana,” Sgt. Doug Morse told the Sacramento Bee, though the victim was "a longtime employee of the Campbell Soup plant in Sacramento," had no criminal record in Sacramento County, and the who0le situation “doesn’t fit his profile," according to a Gibson family friend.

Though Sacramento Police declined to name suspects or elaborate on a motive, they clearly know more than they're saying: The Chron reports that yesterday, a man who was being treated at SF General had been detained in the case.

SFPD spokesperson Officer Albie Esparza says that the man arrived at the hospital with gunshot wounds to the elbow and knee, saying he had been injured “somewhere in San Francisco," but refusing to cooperate otherwise.

Police initially thought he might have been wounded in a shooting reported near Golden Gate Avenue and Jones Street at 10 p.m. Monday. They later learned that he was a person of interest in the Sacramento slaying, and that the Tenderloin shooting, at the scene of which investigators found blood, shell casings, but no victims, was a red herring.

SFPD detained the man, who has yet to be identified, as Sacramento police traveled to SF to interview the man. Calls from SFist to Sacramento police to determine if the man had been arrested were not returned at publication time.