As it happens, I found a Google cache of Trayvon Martin's Twitter account, @NO_LIMIT_NIGGA.
Martin used this photo as his Twitter page background:
That's the mugshot of rapper Corey Miller, aka C-Murder, who is doing life without parole for beating up and shooting to death 16-year-old Steve Thomas in 2002 at a night club in Harvey, Louisiana. Quite the role model for an up and coming wannabe gang banger, don't you think?
Martin's Twitter account handle was NO_LIMIT_NIGGA. He listed his name as SLIMM, his location as YO HOE CRIB, and his favorite website as LIES.COM. Dude liked caps!
And it is for sure the right fellow's account. It contained a birthday greeting from the lovely and charming EatYhurBrainz, aka Kia (whose ballistic background pic would have pleased Doc Edgerton). Kia turns out to attend the same high school as Martin. And her greeting would have been sent on the evening of 5 February. Martin was born on 5 February 1995.
You can see the Google cache, dated Feb 6, 2012 12:29:45 GMT, here. (You will need to disable JavaScript to avoid being redirected to a blank Twitter page.)