What form are required to reopen and regain custody

the court forms can be found here: https://www.courts.state.md.us/family/family-forms you will need an information sheet, a motion to modify,...

Evicting Step son and husband

This is something you should discuss with an attorney in private when discussing your rights and options regarding the pending divorce, as well.

Interim agreement between two parents

Maybe not initially but unless you have a good reason not to bring him back, it could possibly look negative in a final court proceeding. You...

unless there is a no contact order and/or the graduation is in a private location, then there isn't much legally that could be done to prevent said...

How do I go about enacting a law for grandparents rights in Maryland?

go to the state delegate where you live and see if he/she will help try and create a bill.

If your father is competent he can sign a medical directive for you to be involved. Otherwise, you will need to file for guardianship.

I switched the practice area of your question to immigration so you can obtain the best response possible.

If you are going through a divorce with your current spouse and paid money during the marriage from your income or other sources of marital funds,...

Your attorney would be the best person to discuss this with as he/she has all the facts needed to properly advise you.

How long does a father have to neglect paying child support before it is considered abandonment

And what are you trying to accomplish by trying to ha e a finding of abandonment?