Can an employer put a hold on your paycheck due to damages?

My husband accidently forgot to put the brakes on a forklift, which in turn caused it to roll down a slanted hill and into a customers car. He got fired (understandably) but his employer said not only was he not going to get his paycheck (today happened to be payday) but the hold also applied to his final paycheck due to damages. Is this legal? for the record we live in California.