The victim suffered severe burns to 75 percent of his body.

OLDSMAR, Fla. -- A man is accused of murder after detectives say he doused a fellow homeless man with gasoline and setting him on fire.

The Pinellas County Sheriff's Office says it happened early Saturday morning on property owned by the Southwest Florida Water Management District near Tampa Road and Eastlake Road in Oldsmar.

Deputies say Harold Rosenbaum, 44, got into a drunken argument with 60-year-old James Heffernan inside a tent at the camp. The argument turned into a fight and spilled outside. That's where investigators say Rosenbaum picked up a gasoline can and poured gas on Heffernan, then set him on fire.

Heffernan was taken to the hospital, along with a 64-year-old homeless man who burned his hands and feet while trying to help put out the fire. Heffernan suffered burns to 75 percent of his body, deputies said.

Rosenbaum was arrested Saturday night and charged with attempted murder.

Late Sunday afternoon, Heffernan died at the hospital.

On Tuesday morning, Rosenbaum's charge was upgraded to first-degree murder.

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