Robert Hernandez, who is suspected of starting five brush fires in Sonoma County, spent months as an inmate firefighter after his conviction in the 2016 collision.

A 38-year-old firefighter accused of setting multiple fires in Northern California had received firefighting training while serving a six-year state prison sentence for gross vehicular manslaughter, according to state corrections officials.

Robert Hernandez who was charged with starting five brush fires in Sonoma County spent months as an inmate firefighter after being convicted of causing a fatal collision, according to officials