If you are an at will employee can you then be forced to give a 90 day notice before quitting?

I see no basis for this requirement unless you are a contract employee or part of a union.

My employer wants me to change my schedule although I cannot do so. If I don't agree, they threatened my job.

Are you part of a union? If not, they do have a right to manage your hours unless your schedule is specific to medical care for your child.

Can my employer give me 76.6% decrease in pay and demotion without a 30 day notification?

If you feel that you've been discriminated against by based upon age, religion and have been retaliated for complaining about such, you should...

For what period of time is documentation of harassment in the workplace valid

Assuming the complaints were related to a protected issue such as race, gender, age, etc, the issue is whether they've taken remedial measures...

Can I sue for wrongful termination and forged signature by my director of nursing

You should find a local attorney. State labor laws can vary. In New Jersey, I might be able to make a public policy claim against the employer...

Is requesting a second opinion from another attorney unethical?

Generally speaking lawyers won't mind giving their point of view to the facts. Our ears peak up when we are the 2nd or 3rd retained attorney.

Do I have a case? What can I sue for?

Based on your facts, and assuming that you are not a union member, it appears that you do not have much of a case. An employer can rely upon...

Can an employer take pictures of an employee working to use against them

Yes.

Can I bring a wrongful termination action against employer for being fired after coming back from medical leave

I am not a Colorado attorney. From your fact pattern, it does not appear you are protected under the FMLA due to the amount of time you were...

I am not a California attorney. With that said, previous employers, at least the smart ones tend to give "name, rank and serial" number type of...