Police Officer Darrin McMichael was struck and killed by a hit-and-run driver on Interstate 20 near St. Augustine Drive at 6:10 a.m.

While driving his department motorcycle to work, Officer McMichael struck the back of an SUV when traffic suddenly stopped in front of him. The collision caused him to fall off his motorcycle. Before he could get up, another vehicle ran over him and drove away.

Officer McMichael was transported to Baylor Medical Center where he died from his injuries.

The driver has not been apprehended.

Officer McMichael had served with the Arlington Police Department for 24 years, assigned to the Motorcycle Unit for 13 years. His wife also serves with the agency.

Deputy Sheriff Ryan Clinkunbroomer was shot and killed in an unprovoked ambush at the intersection of Sierra Highway and Avenue Q just outside of the Palmdale Sheriff's Station at about 6:00 p.m.

Deputy Clinkunbroomer was stopped at a red light when another car pulled alongside his patrol and an occupant opened fire, striking him in the head. A passerby located Deputy Clinkunbroomer in the vehicle moments later and alerted authorities. Deputy Clinkunbroomer was transported to Antelope Valley Medical Center where he succumbed to his wounds.

A suspect was arrested later after a several-hour stand-off.

Deputy Clinkunbroomer had served with the Los Angeles County Sheriff's Department for eight years and was a third-generation member of the agency. He is survived by his fiancée, parents, and grandparents.