I'm not in CA.
Any tort claim probably needs to be presented to the DMV or state transportation department. The officer wasn't the one who mangled the records. The officer acted on the information presented to him by his computer. Consult an attorney about who to make the claim against, or possibly make the claim against them both, but do NOT collect on both claims or you might be inviting criminal trouble.
I told me I was at 38MPH instead of 25. He asked me if I have any particular reason why I was speeding which I say no. I wonder how he was able to know my speed since I did not pass him and was turning back to me.
There are different kinds of radar and they don't require that you pass the officer. Additionally, when he asked if you had a reason for speeding and you said nope, you kind of are admitting that you were speeding.