From WENN.com

The former star of Nickelodeon's popular Zoey 101 series was picked up by police outside Cloud 9 - the venue he co-owns in Port St. Lucie, Florida - on 7 November (12).

It came just months after the 22-year-old actor was arrested in April (12) on suspicion of cannabis possession and contributing to the delinquency of a minor. He pleaded no contest and was sentenced to 12 months probation.

TMZ.com reports that Underwood failed a drugs test and had not completed a substance abuse program - and he has now pleaded not guilty to violating his probation.