Johnny Cash has gone to jail for several occasions. He has been in jail 7 times, but all for misdemeanors, and only stayed over night. Once was because he was caught picking flowers on private property. There as also an incident where he was mistakenly accused of smuggling drugs from Mexico, when they were actually his own prescription drugs.
Throughout his life, Johnny Cash had spent a few nights in jail. For one, he was accused of smuggling drugs, but that turned out to be a misunderstanding. All incidences were misdemeanors and he never served any hard time.