George Zimmerman Speaks! (DETAILS)

George Zimmerman, 28, the neighborhood watch captain that shot and killed 17-year-old Trayvon Martin, spoke for the first time today, in the form of a voicemail left on his most vocal supporter.

STORY: The 411 On George Zimmerman 

Frank Taaffe, a former block captain at the Sanford, Florida gated community where Zimmerman shot and killed Trayvon, said Zimmerman left a message on his phone, which Taaffe released to the media on Friday. The message came from an unknown number.

In the message Zimmerman said-

"Hey Mr. Taaffe," the message began. "This is George. Um, first and foremost, I wanted to say I am very sorry for the loss of your son, and, um, I can't imagine what you must be going through. Um, secondly, I wanted to thank you for doing everything you've been doing. Um, I know you don't have to, and I appreciate it, and you're truly setting an example for me for the future of, uh, doing the right thing even when it's tough, and, uh, I appreciate it. I'll talk to you soon. Thanks."

Zimmerman has not been seen publicly since news of the shooting went viral.

Trayvon's mother and father have been calling for Zimmerman's arrest, including more than 1 million people who signed an online petition posted on behalf of Martin's family.

Sanford police say they are barred from doing so since officers on the scene determined the shooting was justified.

Zimmerman's whereabouts remain unknown as he has recieved numerous death threats.

Trayvon's case has become national news and everyone is calling for justice including President Obama who said If he had a son, he'd look like Trayvon. Justice will come. #Hoodiesup.