My question involves criminal law for the state of: Florida (As I know weapon laws are quite different in different states)

So as I stated in a previous thread that I'm writing a story and would like to know something else regarding law enforcement. Again, I will not say what the story is about to protect it. Since my first question has been answered, I thought I'd ask my second question. I would like to know what would happen if the police searches a vehicle and finds one or more guns, assault rifles, shotguns, or any guns? Would they take him to jail? Does he have a right to those guns and will he be let go? What will be the charge?

Does it matter that he says he does have guns in the backseat? What if he doesn't say he has any weapons and the police find it?