Deputies shot McNabb with beanbag and nonlethal rounds before fatally shooting him, officials said.
He was taken to a hospital where he was pronounced dead, the Star reported.
McNabb worked as a custody deputy with the Santa Barbara Sheriff’s Office from June 2001 to March 2012, when he voluntarily resigned.
He was arrested by Oxnard police in September 2012. He was convicted of felony domestic violence in May 2014.