I see this as a tool for constructive dismissal. Do you feel that my thoughts are correct?

Almost impossible to say through a forum like this. You have a better feel for the situation. If you're getting that impression then your read...

How deep can the company I work for dig to discover who is sending the emails and making the phone calls?

They can dig as deep as they want to but as already stated they are looking to protect themselves, not you.

I think they can. Under the FMLA a mother can use 12 weeks of FMLA leave for the birth of a child, for prenatal care and incapacity related to...

Can my employer make me pay the legal fees for filing the greencard? Should I pay the attorney fees or fees for processing?

Your question is being retagged as an immigration law question.

Can my employer take money I was never informed I was receiving out of nowhere?

Your question is unclear. Contact a local employment for guidance.

Why cant I quit a job where my employer is acting illegally, no insurance, no overtime? How do I win this appeal?

Keep appealing and make your argument about quitting because you needed a less physically challenging job. You should probably hire an employment...

You can try to file charges but there's basis for doing so.

Is it legal to use a witness name in a letter of termination

Yes it is. Why would you even care?

Can they prosecute me? What are my options?

You should explain what happened to the money and agree to have reductions from your paycheck to pay it back. It was after all your mistake.

What do I do when your boss asks you why you haven't quit yet ?

It's not illegal for an employer to be a jerk.