There is no law prohibiting this.

I would like to get a Divorce after many years of a failed marriage, There are no children.

If you want to seek advice you can ask a question. If you want to file for divorce, consult with a local attorney.

Drug tests

No attorney on this forum can speak to whether or not he is being properly tested, why he is not testing positive, or if the PO cares.

Is there a difference if there is one criminal show cause verses 16

You posted this question multiple times. You need to consult an attorney.

Criminal show cause

Generally speaking, one criminal charge is not as serious as sixteen criminal charges of the same offense. You need to retain counsel.

Is this parental alienation?

If you have an agreement or court order that she may be in violation of you should seek to enforce that order and/or agreement. Further, you...

Criminal show cause

Yes there is a difference between facing one criminal charge and facing sixteen. Get an attorney.

What legal steps need to be taken when one parent becomes incarcerated and wants to give a POA to the step-parent?

An experienced attorney needs to be consulted. A power of attorney is not really applicable to the situation, this would be an issue of parental...

Well you can't have it "cancelled" though you can challenge it in court. You should meet with a local attorney and have your case reviewed. There...

The Commonwealth can refile the charges but it will be based on the facts of the particular case. It is entirely in their discretion.