Graham Pratt is a character that appeared in Burned.
It is revealed that he was Tabitha Clark's boyfriend until her death. At first, the girls suspect him of being "A", and believe that he is trying to hurt Aria. However, by the end of the book, he has been deemed as innocent after being injured in an explosion that leaves him in a coma.
In Crushed, the Liars suspect that he was not trying to hurt Aria; rather, he was trying to warn her that someone is after her. After he wakes up from his coma, he confirms this to Hanna; however, before he can tell her who it is, he begins having spasms, and Hanna leaves to find a nurse. While she is gone, Alison DiLaurentis, disguised as another patient named Kyla Kennedy (whom she killed), finishes him off in order to keep him from telling Hanna what he knows.