Sergeant Michael Abbate and Trooper Alberto Felix killed when struck by vehicle on I-15 in Las Vegas, Nevada

The slain troopers' names have not been released. It is unclear whether the driver who struck the troopers has been arrested.

The suspect, Jemarcus Williams, 46, was arrested Thursday afternoon. Police believe Williams was impaired when he allegedly hit the two troopers.

Jemarcus Williams, 46, was booked into the Clark County Jail Thursday on two counts each of DUI resulting in death, reckless driving resulting in death and duty to stop at the scene of an accident involving death.

Jemarcus Williams, 46, pleaded guilty to two counts of category B felony DUI resulting in death.