Can I be charged and punished for possession of controlled substance if I had no knowledge of the drugs?

I was arrested and jailed for 2 counts of possession of controlled substance Crystal Meth and cocaine. I do not know how the drugs got there. Please know that I was not the only person in the car at the time. While sitting in cuffs in the police car, the officer asked me about a marijuana scent that was coming from the back seat and I told him I have no knowledge of marijuana in the car because I don't smoke marijuana. He was angry. I was taken to jail but I asked 5 times what am I being charged for and two officers stated for 2 bench warrants. I get to jail and I was given my affidavit and it said possession of controlled substance twice, marijuana 20 grams or less and giving a false name after arrest. He asked questions and demanded answers but never once read my rights or charged both parties with the same charges. He automatically assumed it was mine.