My question involves labor and employment law for the state of: California

I hold a union (AFSCME) job with a county in California.

Some money came up missing and (apparently) the P.I. led internal investigation has identified me as the suspect. (I did not steal or take anything).

I have been placed on paid administrative leave, pending another
investivation, this time done by the risk management department.

My question is:

1) how long can they keep me out on paid leave? Each day I feel my skills and knowledge base of my technical job slipping away, just a little bit. I have been out about 2 months now.

2) Should I consider having an employment lawyer write a letter on my behalf to inquire as to the status of the investigation and to let the County know that I have solicited the advice of an attorney?

3) Frankly, I am concerned that I may not want to return to this job. People are talking and it will be embarrasing to return. Would it be too proactive to suggest an "exit package" in the letter from the lawyer? I mean, the County hasn't done anything yet. No letter of dismissal or anything.

FYI, the union rep said they couldn't help until I received a letter of dismissal.

Please, any comments about my situation would be appreciated.

Vivian