Garner had been with the Department for 9 1/2 years. He is survived by his wife, Helen, and four children.
In honor of Deputy Garner and Community Service Officer Johnson, Capitol flags will be flown at half-staff.
"Anne and I were deeply saddened to learn of the collision that resulted in the tragic deaths of Deputy Garner and Community Service Officer Johnson this morning. Both were dedicated public servants who devoted their careers to keeping the people of Stanislaus County safe. We extend our deepest condolences to their families, friends and coworkers."
CA Governor Brown offers condolences to family, friends, and co-workers of Deputy Garner and CSO Johnson. pic.twitter.com/IrhuONqMYZ— Stanislaus Sheriff (@StanSheriff) May 14, 2017