What happens to the passenger of a stolen vehicle that had no knowledge?

My husband has been arrested for being a passenger of a stolen vehicle. He had no knowledge the vehicle was stolen, the driver had a key and claimed it belonged to a family member. The driver is now trying to throw my husband under the bus because he not only has open cases but we've found that he's an illegal alien. We can also prove my husband was not at the scene when the car was stolen. My husband is being charged with grand larceny, yet after a month of holding there is still no indictment number, and his first court date has simply been adjourned to a later date. The lawyer has had no contact and my husband and I are very lost as to what we can do. I am pregnant please give us some info fast. Thankyou.