Boyfriend being charged with 2nd degree assault and menacing with a deadly weapon

Subpeona power is available. Local practice will govern the specifics of the procedure. Consult and retain an experienced criminal defense...

Do federal judges / courts investigate cases ?

Law enforcement (executive branch) investigates alleged wrongdoing not the courts, i.e. the judicial branch.

Local law and policy governs. If the "harassment" is continuing as you suggest then time limits are moot.

My friend has been arrested for domestic violence on his wife, can he also press charges on her for the same situation?

Theoretically, yes but most prosecutor's office policy would indicate NO to the filing of cross charges in the same fact pattern.

Roughly how long will someone be in jail for probation violation in the state of PA?

Sentencing parameters are a complex mix of law and facts. Only a local experienced criminal defense lawyer after a complete review of the case...

How much does it cost have a misdeameanor expunged

The "cost" is composed of two types. One is a cost the includes the filing fee and any coping fees that the clerk and the law enforcement agencies...

What can I do if there has been some fraud and embezzlement involving a parent's assets?

Consult and retain an experienced local attorney ASAP. The police may help but the coordination and presentation by an experienced attorney is key.

I was arrested for domestic battery/ touch charge a misdemeanor but charges got nolle prosse is that consider being a conviction

Nolle Pros is not a conviction however the arrest may still be on your record. Consult and retain an experienced criminal defense attorney ASAP to...

Is the victim a credible witness if his story changed throughout the investigation?

Credibility is in the eye of the beholder. In the criminal justice system the beholder is the trial judge or the jury.

Is the victim a credible witness if his story changed throughout the investigation?

Credibility is in the eye of the beholder. In the criminal justice system the beholder is the trial judge or the jury.