Can you really get arrested for something your passenger hid in your car? Well, what did he stuff under the front seat? Did he stuff his granddaddy's or his bag of or his Sunday school notes from church? What exactly did he put under your seat? If you were aware of what he had and you were aware of him putting it under your seat, then yes, you can be liable for that. But if you didn't know what he had and never knew that he had it, you can defend that in court. Doesn't mean you won't be arrested for it, but it means with a good lawyer, you won't be convicted of it.