You could have a lot of fun with that! “yeah...this is Zimmerman. I killed that little 11 year old Skittle eating punk in cold blood. Whatya gonna do about it?”
Ya might wanna make it more credible ... “killed that DXM drug addled seventeen year old drug pushing mixed martial arts wannabe. Wadder youse wanna do bout it? Wanna meet my cousins Lenny, Guido, and Donk, down at the docks?”
And that would probably land you in court (true or not the facts were..).