For starters, it's a crime to file a false police report. Two, you husband really needs an attorney in order to protect his rights, and go over what really happened, and to make sure he doesnt get wrongly convicted.
With that being said, the problem with DV cases is that often times people make false reports out of anger, while other's make true reports and later say they made it up because they realize the consequences. Either way, officers cannot pick and chose which reports are true or false, in order to protect the victim.
Your husband really needs a qualified attorney to protect his rights. Make an appointment with local counsel, as consultations are typically free, and see what the attorney can do for you.