A man and a woman were indicted Wednesday in an alleged road rage-related crash on Interstate 10 near Highland Road in March that killed five people, including three children.

An East Baton Rouge Parish grand jury charged David Ryan Leger, 29, with five counts of vehicular homicide and Kelsye Jacque Hall, 22, with five counts of negligent homicide.

District Attorney Hillar Moore III said Leger, of Palmetto, faces five to 30 years in prison on each count if convicted. Hall, of Baton Rouge, faces two to five years in prison on each count if convicted, he said.

The March 13 crash killed Kimberly Stagg, 19, and Effie Fontenot, 29, both of Prairieville, and Fontenot’s three young sons — Austin Fontenot, 3, Hunter Johnson, 7, and Keagan Fontenot, 11.

Effie Fontenot was driving the car in which her sons and Stagg were riding.

Leger’s blood-alcohol level was 0.10 percent, an arrest warrant said. In Louisiana, a blood-alcohol level of 0.08 percent is considered presumptive evidence of intoxication.

Leger’s attorney, Tommy Damico, said Wednesday he is challenging his client’s blood-alcohol reading.

“We’re going forward with our investigation,’’ he added.

State Police Lt. Doug Cain has said Hall and Leger were involved in some sort of encounter while driving westbound on the interstate that led to Hall intentionally preventing Leger from passing her vehicle.

At one point, Cain said, Hall was driving on the center line to keep Leger from passing on either side.

When Leger drove onto the right shoulder of the interstate in an attempt to pass Hall, she moved into the right lane as Leger was merging back onto the road, and the rear of his truck clipped the front of Hall’s vehicle, Cain stated.

Leger’s pickup spun out of control, crossed the median and collided head-on with Fontenot’s car. The car burst into flames.

Their cases have been assigned to state District Judge Trudy White.

In a lawsuit filed in April in Baton Rouge state court, Stagg’s parents are seeking an unspecified amount of compensatory damages from Leger and Hall, and punitive damages from Leger because he allegedly was under the influence of alcohol at the time of the crash.

Leger and Hall are free on bond.