As I'm sure you've heard by now, T.I. was arrested trying to get into his gated community. One story is that T.I. didn't have his key. The security guard finally let him in, and then T.I. returned to the guard house to question the security officer. According to the 911 call, T.I. threatened the security officer. He was arrested for assault and public drunkenness. According to T.I., the security officer was asleep when he arrived trying to get in.
TMZ got video from inside the jail, where T.I. is questioning a police officer as to why he was arrested.