My boyfriend is on probation and went to see his p.o yesterday and ended getting locked up again for 3 days. Im a little confused he had told me well left me a message saying that he would most likely get locked up for 3 days but didn't tell me why. Does anyone know while on probation what you can get locked up for, for 3 DAYS? Thanks for your help!;)

Likely Some Violation, I'm sure, especially if he knew ahead of time.
Otherwise, he would have said, he will see you later?