The Louisiana man accused of killing Saskatchewan Roughrider Joe McKnight during a road rage dispute was indicted Thursday on a charge that carries a mandatory life sentence.

A grand jury charged Ronald Gasser, 55, of Terrytown, with second-degree murder, Jefferson Parish District Attorney Paul Connick Jr. said in a news release. The charge can be brought against someone who means "to kill or to inflict great bodily harm."

As a result of the indictment, Judge June Darensburg increased Gasser's bond from $500,000 to $750,000, Connick said.

Connick said he would have no further comment on the indictment. Defence attorneys Gerry Archer and Matthew Goetz did not immediately respond to an email requesting comment.

​Authorities have said both McKnight and Gasser were driving erratically and yelling at each other before they stopped and McKnight walked to Gasser's vehicle the afternoon of Dec. 1. They said when McKnight, 28, confronted Gasser, who was still seated in his car, Gasser pulled out a gun and shot McKnight three times.

Gasser re-arrested in December

Gasser remained on the scene and gave his gun to deputies, Sheriff Newell Normand said at the time. Gasser was released after initial questioning, but was re-arrested Dec. 6 and jailed on a charge of manslaughter.

The sheriff was criticized for not keeping Gasser in jail from the start, even though Gasser was immediately identified as the shooter. Normand said at the time that thorough investigation was needed because of laws providing a defence to certain crimes. He didn't specify.

Gasser is white; McKnight was black.

McKnight spent 3 seasons in NFL

McKnight was considered the No. 1 running back recruit in the country when he came out of John Curtis Christian School in Louisiana in 2006. He signed with the University of Southern California, where he ran for 2,213 yards and 13 touchdowns and caught 66 passes for 542 yards and two scores in three seasons.

In the NFL, he played three seasons for the New York Jets and one with the Kansas City Chiefs. He spent the past season in the Canadian Football League, playing two games for the Edmonton Eskimos and three for the Saskatchewan Roughriders.