Prisoners Phone conversations are all recorded, So it’s good not to prove you committed perjury and be a callous jerk who’s bereft of remorse when you are a defender in a manslaughter case after murdering a teenager:

They also discussed Zimmerman getting out on bail, and how to keep him from the press. The Sentinel reports that his choice of words was not ideal:

… “Well, I have my hoodie,” he says, a possible joke, referring to the hooded sweatshirt Trayvon Martin wore the night Zimmerman shot him in Sanford, Feb. 26.

source: George Zimmerman Jailhouse Tapes Reveal Ill-Conceived Code Words, Hoodie Reference — Daily Intel.