ORLANDO, Fla. (AP/WAOK) — Attorneys for a Florida neighborhood watch volunteer who fatally shot an unarmed black teen have withdrawn as his counsel, saying they haven’t heard from him since Sunday.

Attorney Craig Sonner said Tuesday in a news conference that against their advice, George Zimmerman contacted the special prosecutor who will decide if he should face charges.

A spokeswoman for Angela Corey’s office didn’t immediately respond to an email and two phone calls requesting comment.

Zimmerman is at the center of an investigation over the shooting of Trayvon Martin, 17. Zimmerman says he shot Martin in self-defense after following him in a gated community in Sanford on Feb. 26.

Martin, who was unarmed, was black. Zimmerman’s father is white and his mother is Hispanic.

Rallies continue to be held around the country to protest the killing and call for Zimmerman’s arrest. ABC News reported last night that  shots were fired at an empty police car parked in the neighborhood where the shooting happened.