BUFFALO, N.Y. (WIVB) — A 31-year-old Buffalo man pleaded guilty to one count of aggravated vehicular homicide Thursday afternoon.

Justice C. Coniglio was speeding east on Clinton Street on Dec. 1, 2021, around 11:15 p.m. while under the influence of alcohol and cocaine when he rear-ended a vehicle that was stopped at the Babcock Street intersection, according to the Erie County District Attorney’s Office.

The crash pushed the victim’s vehicle into the back of a second vehicle that was also stopped at the intersection.

James Boyd, 47, of Pennsylvania was in the vehicle initially rear-ended and died at the scene.

Coniglio was taken to Erie County Medical Center for treatment of serious injuries.

The driver of the other vehicle rear-ended suffered minor injuries.

The 31-year-old faces a maximum of 25 years in prison. He’ll be back in court for sentencing on September 8 at 2 p.m. He’s being held without bail.

“DA Flynn commends the Buffalo Police Department Accident Investigation Unit their work in this case,” the DA’s Office said.

New on WIVB.com

Patrick Ryan is an award-winning reporter who has been part of the News 4 team since 2020. See more of his work here and follow him on Twitter.