CBS

The winner of the CBS reality show “Big Brother 9″ has pleaded guilty to a drug charge and to failing to file a tax return for the year he won the $500,000 prize on the program.

Adam Jasinski, of Delray Beach, Fla., pleaded guilty to both charges in U.S. District Court in Boston on Monday. Sentencing is not scheduled until Jan. 11, but Jasinski was immediately handcuffed and taken into custody to begin serving his time.

The 32-year-old Jasinski was arrested outside Boston last October and charged with possession with intent to distribute oxycodone, the main active ingredient in OxyContin and other painkillers.

Jasinski won $500,000 on “Big Brother 9″ in 2008. The series features contestants who live under constant surveillance and vote once a week to evict each other.