In calif, if dead beat nonpayee per child support is found gulity, what are consequences per criminal case?

The nonpayee now owes 70k in back support, for 3 children, this includes accrueing interest.....his licence already suspended, (I aready know this affects his credit. He doesnt care) my question is.what exactly is DAs office going to do......as far as "criminal prosecution for willfull refusal to pay", besides wage garnishment, ect. He doesnt care,works under the table,lives for free, at home,all bills paid by his mamma.....Is jail really going to be imposed??? The DA contacted me to sign affadavit he has indeed never paid. What do you thinK. Serious answers only please, Regarding actual outcome, not speculation or opinions. Thanks.