Was he due to parole from prison or was he in County jail? If he's in prison and has a CDC#, you can call the Inmate Locator and find out where he is. You can actually call the Locator anyway and find out. 916.445.6713.
As far as him being in "Kern County" that could mean Kern County State Prison, North Kern State Prison, or any other facility in the county of Kern.
If you can post with more info - or email me directly - I'll do what I can to help you find out where he is.