I know I'm stating the obvious here but...
No dealer is so open about their illegal activities that they want to stamp it right in the middle of their street name. That goes double for coke dealers because they (and their clients) are so paranoid. If they do, they're extremely stupid and probably have no clients or contacts. JMO.
No one seriously tells an old friend, "Oh yeah, I was obsessed with her, tried to rape her once at the hilton... <insert graphic story>... that's when she stole my drugs and I stalked her and me and my boy Kronk ended up having to kill her baby." That is so ridiculous. Asinine. Insane.
When escaping an attempted rape and possibly murder, most women would run, run, run and not even worry about their OWN belongings but in this little tale of fiction the victim makes off with a duffel bag full of cash and drugs!
Also in this little tale of fiction, she's a martyr who is going to rot in jail to protect G & C! As someone else said, there has been no indication that she cares about them at all. I happen to think that they were next. Very sad, because clearly they all love her. IIRC, her friend had already started having her mail forwarded there, and there are chat logs of KC saying it would be just the girls in a couple of weeks and that her parents were moving/getting divorced. Something was in the works IMO.
I hope someone with more time on their hands has a chance to really dissect this letter and see if any of the speech patterns are similar to anyone in the Anthony family, or even that crazy lady from all the youtube vids. There are always clues, right? I'm going to bet KC herself wrote it since she is such an awful storyteller and so comfortable committing fraud.