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The 21-year-old was booked in November after refusing to leave a Chicago drug store while drunk after a night on the town. A misdemeanour criminal trespassing charge was later dropped.
He told Empire: "That was complete and utter insanity. I was an ***hole, and it was a mistake. I'm still completely embarrassed about it."
He revealed that the incident had taken place shortly after filming wrapped on Indiana Jones And The Kingdom of the Crystal Skull, saying: "I was in the middle of a strange mind state, having just come off a three-month window of focus.
"I can't diminish what happened at all. But I can say this: I'm not the first 21-year-old to be arrested for a misdemeanour. There are lessons in life I need to learn, and I'm learning all of them in front of the public."
He also told the magazine that he had not taken up acting to become famous.
