I think I found the real Kelly T.
First of all I ask for discretion and for respect if this is offensive to anyone, let me explain, we all know "Deuce Komradz" and its OG version where Devon mentions his teenage friends Kelly T, Dro and Sarah, one day I was listening to this song and I remembered this website called "find a grave", look for the name Kelly and a cemetery from Troy, Alabama, and I found this, after a little searching I found a news story about Kelly's passing, he died in a car accident in 2005.
Her mother sponsored an teen victim impact program called "It Won't Happen To Me" a program that helps prevent teen driving related deaths.
I infer that it is him even though I can be wrong, from the location, the name and surname of the victim, from his date of birth I can infer that he and Devon coincided together while he lived in Alabama, and I think Devon did a song in 2015 where he mentions him again, a rather sad event and one that I hope no one has to go through.