Trayvon Martin, the 17-year old Florida teen who was shot by a self-appointed neighborhood watch member in February, was apparently on the phone when it happened…and his last words could be damning for the man accused of shooting him.

The suspect, George Zimmerman, has admitted to the fatal shooting, but he claims he did it in self defense after following a “suspicious” person in his neighborhood who looked like he was “up to no good”. Even after police advised Zimmerman not to follow Martin–who was unarmed–however, he continued to trail him, and now Martin’s girlfriend says she was on the phone with him and heard everything.

She says Martin told her someone was following him and she advised him to run. Moments later, she heard him say, “Why are you following me?” before hearing the words, “What are you doing here?” This was followed by a scuffle and then the connection broke. It would be the last time she would ever speak to him.

Benjamin Crump, the family’s attorney, says phone records corroborate the girl’s story and is hoping this will be the evidence he needs to put Zimmerman away. But Florida law may make it harder to get a conviction.

“As long as you are somewhere you have a lawful right to be, if someone attacks you, the words of the statute are you can meet force with force, including deadly force, if you reasonably believe that that is necessary,” Jeffrey Bellin, who teaches law at Southern Methodist University, told NPR.

The case has attracted national attention as well as that of the FBI and has now gone to the grand jury. There are several petitions going around online in support of justice for Trayvon and social media has been the perfect outlet for public outcry, which includes celebrity voices.