Can I take back admitting to these drugs?

You can always change your story, but the officer will still testify to what you said at the time. The jury will decide which story to believe.

Can I hire a lawyer while incarcerated before sentenced

You can hire a lawyer to represent you at sentencing or for any other reason.

You are correct that no federal prosecutor is going to wade into your divorce proceeding. If you do not have a forwarding address, get a po box and...

Have substantial assistance. How can we ensure Feds honor their agreement or are we at their mercy?

Presumably your son has a lawyer. It is his job to be sure his client gets the full benefit for his substantial assistance.

I need to get an FBI fingerprint background check. Will a federal mail fraud conviction show from 1989?

Your federal conviction will show up on a background check.

The best way to determine how the Pharmacy Board will treat a prior arrest is to speak to the Pharmacy Board.

Cause of an accusation and double jeopardy?

Double jeopardy is when you are charged with the same crime twice. That does not seem to be your situation.

Can a convicted felon own/posses a shotgun or rifle in his own home in the state of texas?

As a felin, it is a federal crime to possess a firearm for any reason.

A federal case with a "binding plea agreement" does not specifically quote any federal statue that would bind sentencing by the?

You can always write to the judge. The sentence he can impose depends on what the plea agreement says. The language you quoted doesn't answer the...

Can someone not directly a victim in a federal case still be allowed to send a character letter to the judge when they've been

Anyone can send a letter to the judge, victim or not.