My husband was arrested for Possession of a firearm by a felon or narcotic drug user. He's in the county jail serving a violation. We went to court last week we got news that the state dropped the charges and now he has a release date which is after he serves his violation time. The day before we went to his court the federal marshals put a detainer on him. So my question is how long can they hold him? Also, being that the state dropped the gun charge. What charge can the Feds have on him?