P.I. Charges

I was arrested early friday morning on a PI charge they did not give me any tests just put me in a cell for 8 hours and let me go what is the worst that i can expect. What is most likely i will get? I was also setting in the pasenger side of my truck. Can they change the charges against me?

What specific charge are you facing (identify the statute), and in what state?

Public Intoxication is the only thing that the police officer charged me with. In the state of Indiana.

What's the statute or ordinance?