It depends. If he received a suspended sentence and is on probation, the ICE will likely assert he was convicted of a drug offense. A conviction for any crime related to controlled substance offense is not only a deportable offense, but also makes him subject to mandatory detention (no bond) once ICE begins the process. If this is the case, being on probation is not a safety net. ICE can institute proceedings at any time once the conviction is final. If your friend believes he was misadvised, then he should contact another attorney who handles criminal cases as well as immigration/deportation matters. See Link Below.