The officer had been speaking with the man outside the convenience store before the confrontation, Officer Angela Bennett, a police spokeswoman, said.
A Huntington Beach police officer came in contact with a male suspect at about 9:30 a.m. and an an officer-involved-shooting took place, police said.
Some also said that the video did not tell the whole story as there can be many factors behind the officer-involved shooting.
He was taken to hospital where he was later pronounced dead.
Police say the man was hospitalized and later died.
Listing the reasons of what might have escalated the situation, Heal said that the officer "could have thought the man grabbed his taser" and that weapon can disable an officer. In one video, the suspect is seen struggling with the officer on the ground and appears to pull something out of the officer's waistband.
Huntington Beach Chief of Police Robert Handy defended the officer.
It is unclear whether the officer was firing live ammunition or nonlethal bullets. When asked about this, Bennett repeatedly responded that the shooting was "an OIS". Seven rounds can be heard as the man stumbles backward and then collapses against a wall.
The officer picks up a radio and speaks into it, but it's not clear what he says.
Marina High School was temporarily on lockdown nearby as a precaution, police said.