A probation violation can mean jail time for an accused. Under Pennsylvania law, probation is defined as a period of time that the defendant is supervised by the county in which the defendant was sentenced. The time period for how long a defendant can be placed on probation is set by the sentencing court. If a Defendant violates the terms of his probation, then he has committed a probation violation. When a defendant commits a probation violation, the court can either sentence him to more probation or sentence him to a period of incarceration. Chester County Criminal Lawyer If you are facing a probation violation, you should strongly consider contacting an experienced Chester County Probation Violation attorney immediately.