A Prairieville man accused of being under the influence of drugs during a crash that killed a Dutchtown High freshman in 2014 will serve one year in prison and two years in home detention in a plea agreement earlier this week.

Dwight P. Perrilloux III, 20, pleaded guilty to a single count of vehicular homicide and two counts of vehicular negligent injuring but avoided major prison time in a deal with prosecutors, court minutes say.

Perrilloux will also pay $28,358 in restitution to the victim’s parents and be under four years of supervised probation after his home incarceration ends. Judge Thomas Kliebert Jr. of the 23rd Judicial District sentenced Perrilloux on Monday at the Ascension Parish Courthouse Annex in Gonzales.

Claire Carline, 15, of Prairieville, was killed on her way to school as she rode in a car with her two older sisters in the early morning of Dec. 9, 2014.

She was riding in the back seat of a car driven by one of her sisters when, State Police said, Perrilloux crashed into them head-on.

Troopers said Perrilloux, then 19 and listed as living in Reserve, swerved into the Carlines’ westbound lane on La. 74 after he drove over the Interstate 10 overpass just east of Dutchtown. Perrilloux was trying to avoid a line of traffic backed up at the bottom of the overpass. Carline, who went by the nickname “Claire Bear,” had only the lap portion of the her seat belt on, troopers said.

Her sisters suffered fractured backs and other injuries but survived the crash.

In addition to vehicular homicide and negligent injuring, Perrilloux, 37214 St. Marie Ave., Prairieville, also faced single counts of driving while intoxicated and reckless operation from the crash.

As part of the plea bargain, prosecutors dropped those counts and unrelated counts of domestic abuse battery, simple battery and entering an inhabited dwelling from February 2015. Prosecutors did not respond to requests for comment Wednesday.

Nghana Gauff, Perrilloux’s defense attorney, declined to comment on the agreement, in which Perrilloux admitted to driving under the influence of an unspecified drug.

But Gauff offered hers and Perrilloux’s prayers for Carline’s family and said she hoped her client will take advantage of this opportunity for his life after he completes the sentence.

To pay off the restitution, Perrilloux must pay the Carlines monthly payments for six years, starting when his home incarceration ends.

Follow David J. Mitchell on Twitter @NewsieDave.