Can a district attorney refuse to present evidence that you have or subpoena evidence to support your case?

We can't second guess the DA. But he/she is the one prosecuting the case. If you bring a civil case, you can determine how you want to proceed.

The claim would be for violation of contract. Serving him in another state is going to be an issue. Contact a local attorney. As stated above,...

Can a company switch your status from salaried to hourly to avoid paying overtime on a week-to-week basis?

It is unlikely that a manual labor job is exempt. It appears that they are not acting legally, in an effort to avoid paying you earned OT. ...

How can my ex wife's lawyer charge me her fee when she doesn't represent me?

Without reading the document, I assume they are claiming you are not abiding by an agreement, or are otherwise being unreasonable, and this is what...

Is this situation worth talking to a lawyer and taking legal action?

Picture proof of what? If the disparate treatment is based upon a protected class (such as age, sex, disability, race, etc.) he may have a claim.

Their reason for terminating your was a lack of productivity, regardless of the cause. Nothing your your post suggests discrimination based upon a...

When choosing a lawyer who specializes in class action law suite, are the clients bound to only the lawyers in their state?

You need someone who is admitted in the jurisdiction where the suit is being brought.

Agreed, you may have ADA or FMLA issues. Don't provide more details here - meet with a local employment attorney, where what you say will be...

Job Offer letter?

Based upon your question, I would say yes, as the situation is at will. However, I have not seen the entire letter. To be sure, I would show it...

Can they legally fire me for this reason?

It it illegal to terminate someone because of their sexual orientation - yes, it is discrimination. However, the situation you describe is sticky...