Jersey Shore Star Denies Drug Charge

Mr. Unit was arrested in Seaside Heights back in July for possession of a controlled substance ... later determined to be Ketamine, often used as a horse tranq.

After the hearing, Unit's lawyer told us, "There were some issues regarding my client's constitutional rights."

The lawyer added, "We entered the not guilty plea NOT because that's the normal thing to do ... we actually entered the not guilty plea because we believe that based on those issues, John is not guilty."