My husband just got picked up on a trafficking meth warrant when he has never been caught with any meth. What can we do?

He was already out on a trafficking meth charge from which he is totally innocent. Passed the drug test upon being booked into the jail. He was ready to take it to trial and the next thing we know the police pulled me over for “random traffic stop." About 10 officers and investigators had guns drawn on a friend of mine and myself. I had no drugs or paraphernalia but got charged with paraphernalia bc they wanted my husband. That’s how we found out he had a warrant. How is that even possible when he hasn’t been caught with no drugs whatsoever?