Vick has completed the confinement portion of his federal sentence, with 18 months in prison and two more on home confinement. He will now remain on "supervised release" for three years, a condition similar to being on probation, but imposed after a prison sentence. If Vick violates the conditions of his supervised release -- fails a drug test, commits another crime, or the like -- he could be sent back to prison for all or part of those three years.
Vick also pleaded guilty to state charges in Virginia related to the dogfighting operation and was given a suspended sentence of three years. Like supervised release, a suspended sentence is usually conditioned on good behavior by the defendant. Once again, Vick will need to stay out of trouble to avoid facing possible imprisonment in Virginia.