Officials say Jessica Avila Munoz, 31, was driving near Lombardi Court and Sebastopol Road on Friday when a car ran a red light and crashed into her.
Police say the suspected drunk driver has four previous DUI arrests and was driving on a suspended license.
The suspect is now in jail on suspicion of vehicular manslaughter and felony DUI.
MORE: San Jose community service officer killed by suspected drunk driver remembered as loving, kind
Munoz was a member of the Sonoma County Probation Department and worked as a juvenile correctional counselor.
Police say she was picking up her 13-year-old daughter from school when the crash happened.
According to the Peace Officers Research Association of California (PORAC), Munoz attended Santa Rosa Junior College and Sonoma State University, where she earned a degree in Psychology and Administration of Justice. She was a first-generation college graduate in her family.
A GoFundMe and a PORAC donation fund have been created to help Munoz's family with funeral costs.
If you're on the ABC7 News app, click here to watch live