Investigators said Tuesday that they are working diligently to determine how a revered businessman died last month in his North Charleston liquor store.

A relative found Matthew Renken, 39, on April 23 lying under a table inside Port City Liquors on Dorchester Road. He had suffered a gunshot wound the night before, an autopsy later revealed.

A handgun, broken liquor bottles and an unhooked cordless phone were nearby. Blood had pooled around his head.

Kimberly Rhoton, a deputy coroner for Charleston County, said investigators have not yet ruled whether the death was a homicide.

“It’s one of those cases we are working all day, every day,” she said. “We’re doing the best we can to determine the manner of death.”

Renken also operated an event-planning business and previously owned the Gateway House Inn in downtown Charleston. Renken lived with his stepfather, who found his body, and his mother on James Island.

Renken’s acquaintances have told The Post and Courier that he was a humorous man with a wide network of friends. Since his death, they have flooded Facebook and online forums with sentiments of grief.

The North Charleston Police Department has released few details about the shooting.

“Investigators have still not concluded the manner of death,” police spokesman Spencer Pryor said. “They are steady on the case.”

Reach Andrew Knapp at 937-5414 or twitter.com/offlede.

Andrew Knapp is editor of the quick response team, which covers crime, courts and breaking news. He previously worked as a reporter and copy editor at Florida Today, Newsday and Bangor (Maine) Daily News. He enjoys golf, weather and fatherhood.