Police said the man fired at officers the moment they tried to serve a search warrant at his house.
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.
Minneapolis police officer Mohamed Noor has been charged with murder in the fatal shooting of Justine Damond.
Investigators didn't think the man was a part of the call deputies were originally responding to.
This marks the 17th firearms-related police fatality of 2018, already up 167 percent from this time in 2017.
The incident took place a few months after a grand jury declined to indict the officer in connection with a fatal police shooting.
The video offers clarity about the shooting on Monday morning.
"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.
The Baltimore Police Department Commissioner made the announcement after revealing that the FBI has refused to take over the investigation.
A detective was reportedly still negotiating with robbery suspect Marcus Fischer when cops shot him numerous times.
Minneapolis police remove a white nationalist shrine dedicated to Justine Ruszczyk Damond.
The family of a deaf man in Oklahoma City now want the officer involved in the shooting arrested.