An Uber driver who fatally shot a passenger last week has been charged with first-degree murder after deliberation in the death of a 45-year-old man, authorities say.

Michael Hancock, 29, is being held without bond in the Denver city jail in the 2:45 a.m. June 1 shooting of Hyun Kim on southbound Interstate 25 near University Boulevard.

The charge was direct filed Thursday in Denver District Court, Ken Lane, spokesman for Denver District Attorney Beth McCann said Thursday.

Hancock declined to give police detectives his side of the story. Ten bullet casings were discovered near Hancock’s vehicle. Kim’s body was found slumped in his car.

Hancock’s family says he only shot the man because the passenger was beating him on the head. Hancock’s sister, Kilisha Beasley of Aurora, said he fired his gun in self-defense.

Hancock, who has been an Uber driver for three years, does not have a criminal record in Colorado.

Uber’s company policy, which bars drivers and riders from carrying firearms, applies in Colorado.