I would not continue to contact Kaiser. Although you had this expunged and willingly confessed with your interview process, it does not sound like they are going to let this go. I thought EOE meant something ?
Everyone makes mistakes and our court system has ways of deciding what punishments receive what type of action taken. Yours happened to be a misdemeanor. If you've had your record expunged as you said you have this entitles you --- you may answer on questioning to anyone, including employers that you have never been convicted, arrested--this is what expungement means. Expungement is for first time offenders only and encourages them not to enter into the judicial criminal system again, because if you do you will certainly be punished to a further extent. Expungement allows these firstime offenders this opportunity to clear their record after restitution, probation, whatever means, have been successfully completed. Expungement, according to PA law enables you to state your record is clean. You may need to check on your state, (CA) or whatever state you're seeking employment for their expungement definition. Regardless of your past actions, expungement entitles you to a new beginning, and you do not need to disclose your past to anyone, including employers and on interviews. This is not a dishonest approach, but your legal right with expungement. No one is entitled information from your past because it no longer exists--records have been destroyed, they no longer exist.
Expungement does allow to put your past behind you and you do NOT have to disclose your past criminal record. This is the law and how expungement works. Anyone disagreeing with this needs to look up laws regarding expungement.
I would suggest starting your job search
again. When you find something you're interested in, remember, your record is clean. I would suggest not disclosing your past information--as your records have been destroyed opon expungement, stop crucifying yourself and agree to the terms of expungement--it is your legal right. Good luck !! Any further info on expungement I will be happy to chat.