The incident happened on July 1 in the 500 block of Racket Club Lane when deputies responded to a call about a man armed with a gun experiencing a mental health crisis.
According to the Ventura County Sheriff's Office, a family member told deputies that the man - identified as 23-year old Dominic Saad - was armed with a gun and was threatening them.
"He said we were trying to get the gun from him," the family member is heard telling the deputy in the video, which was posted on the Ventura County Sheriff's Office's YouTube channel.
While deputies were talking to the family member, Saad suddenly came out onto a balcony holding a shotgun, according to investigators.
"The subject looked toward the direction of the responding deputies as they identified themselves and provided a command to the suspect to drop the shotgun," said Sheriff James Fryhoff in the video. "The suspect then proceeded to discharge the shotgun and a deputy involved shooting occurred."
Saad was later pronounced dead at the scene.
The sheriff's office said its major crimes unit will continue investigating the incident over the next several months.
The Ventura County District Attorney's Office will then conduct an independent review to determine whether the use of force was legally justified.
"We take the use of force very seriously and make every effort to deescalate these situations whenever possible," said Fryhoff. "Our primary goal is to serve and protect the community while ensuring the safety and rights of all individuals involved. Through diligent investigation and adherence to strict policy standards, we aim to address these critical incidents with the utmost integrity and transparency."