Officers used a Taser to try subdue the man but it did not work.
"Both officers perceived that threat at the same time and they both fired," West Valley City Police Chief Colleen Jacobs said.
Police were called out to a man pointing what witnesses thought was a firearm at people.
"What happened was absolutely horrific and we are so very sorry, so very sorry for your loss," Sacramento Kings owner and chairman Vivek Ranadivé said.
The disturbing footage shows the officers shooting and killing 22-year-old Stephon Clark.
Clark, 22, was pronounced dead at the scene after two officers fired multiple shots at him.
This marks the 17th firearms-related police fatality of 2018, already up 167 percent from this time in 2017.
“We need to change the way that we look at this issue and the way that we talk about it,” Boston University School of Public Health professor Michael Siegel said.
The 16-year-old has been identified by family members as Anthony Jacob Weber.
The twin daughters and pastor of Bettie Jones are calling for justice after new report finds shooting "not justified."
"Please avoid this area," the sheriff's office warned on Twitter.
Police Officer Jason Stockley was acquitted today in the shooting death of Anthony Lamar Smith. Newsweek reviewed court documents and broke down the arguments.
The police officer is being tried in the murder of Anthony Lamar Smith.
The officer, Greg Abbott, claims he was trying to get a nervous driver to comply.
For third time in a week, prosecutors fail to convict a cop
A warrant has been issued authorizing the arrest of former Balch Springs police officer Roy Oliver to face a charge of murder for the death of Jordan Edwards.
Attorney General Jeff Sessions has called for a review of Obama-era consent decrees between the federal government and local law enforcement.
The killing of 25-year-old Ezell Ford was one of many shootings of unarmed black men by U.S. law enforcement that triggered national protests and fueled a renewed civil rights movement known as Black Lives Matter.
Trooper Landon Weaver was killed serving a protection order on Jason Robison, authorities say.
Officers in Missouri and Florida were shot and wounded in unrelated incidents.
A Ugandan refugee was shot by police in a San Diego suburb, and an 18-year-old black man died in a Los Angeles police shooting.
Family of mentally ill man has filed a lawsuit alleging Joseph Mann was in distress, and authorities didn't try to de-escalate the situation before killing him.