Employment probation

As long as the employer is not doing so based on some protected status such as race, gender, religion or some protected activity, it MAY be lawful.

Job reference issues

I would start by sending him a stern certified letter, preferably coming from an attorney you consult with and if he persists, look into your legal...

Harassment

Generally speaking, a single incident has to be pretty outrageous to constitute sexual harassment in a legal sense.

Barista - sexual harassment

Not Per se, but he is really toeing a fine line. If you feel uncomfortable, let your HR department know.

Harassment prevention

I am not sure you can avoid complaints, but an attorney certainly can help you comply with the law to the fullest extent. There may still be...

Labor law issue

What the employer is doing if that is the case is probably illegal (it is for sure illegal if you mean sexual harassment), I would engage an...

Corporate tax reporting

You can contact your state taxing authority. The IRS may also be able to give you a transcript.

Employee law

I would presume that you could legally volunteer your time to the employer, BUT many employers, especially these days are doing all they can to...

Overtime for night work

I have practiced in California for a while and not heard of that.

I am not sure that the convictions a minor sustains are public record. You may want to check on that first.