Metro Police Officer Andrea Simon on patrol on Las Vegas Valley roads during her Friday, Dec. 29, 2017, graveyard shift.

Metro Police Officer Andrea Simon on patrol on Las Vegas Valley roads during her Friday, Dec. 29, 2017, graveyard shift.

Revelers celebrate Earth Day near Downtown Las Vegas, Saturday, April 23, 2017.

Revelers celebrate Earth Day near Downtown Las Vegas, Saturday, April 23, 2017.

Supporters of Culinary Local 226 gather in front of the Palms to rally for unionization efforts there, Friday, March 18, 2016.

Supporters of Culinary Local 226 gather in front of the Palms to rally for unionization efforts there, Friday, March 18, 2016.

On-lookers watch a live segment of CNN's "Anderson Cooper 360" on the UNLV campus, Tuesday, Oct. 18, 2016, a day before the third and final presidential debate between Republican Donald Trump and Democrat Hillary Clinton.

A grieving loved one of a slaying victim shows up to a North Las Vegas shooting scene (lost original caption).

At a news conference Thursday, Feb. 25, 2016, Metro Police Lt. Dan McGrath discusses the robbery and slaying of a man who was walking home Saturday from work in the in the 4600 block of Grande Mirada Way.