Prosecutors: Zimmerman Ignored Dispatcher Warning After weeks in hiding, George Zimmerman made his first courtroom appearance Thursday in the shooting of 17-year-old Trayvon Martin, and prosecutors outlined their murder case in court papers, saying the neighborhood watch volunteer followed and confronted the black teenager after a police dispatcher told him not to. The brief outline, contained in an affidavit filed in support of the second-degree murder charges, appeared to contradict Zimmerman's claim that Martin attacked him after he had turned away and was returning to his vehicle. In the affidavit, prosecutors also said that Martin's mother identified cries for help heard in the background of a 911 call as her son's. There had been some question as to whether Martin or Zimmerman was the one crying out. The account of the shooting was released as Zimmerman, 28, appeared at a four-minute hearing in a jailhouse courtroom, setting in motion what could be a long, drawn-out process, or an abrupt and disappointingly short one for the Martin family because of the strong legal protections contained in Florida's "stand your ground" law on self-defense. During the hearing, Zimmerman stood up straight, held his head high and wore a gray jail jumpsuit. He spoke only to answer "Yes, sir" twice after he was asked basic questions from the judge, who was not in the courtroom but on closed-circuit TV. The defendant's hair was shaved down to stubble and he had a thin goatee. His hands were shackled in front of him. George Zimmerman during a court hearing Thursday April 12, 2012, in Sanford, Fla. Zimmerman has been charged with second-degree murder in the shooting death of the 17-year-old Trayvon Martin. (AP Photo/Gary W. Green, Orlando Sentinel, Pool) Close He did not enter a plea; that will happen at his arraignment, which was set for May 29. Zimmerman's attorney, Mark O'Mara, has said his client will plead not guilty. A bail hearing for Zimmerman probably will be held April 20, O'Mara said late Thursday. To prove second-degree murder, prosecutors must show that Zimmerman committed an "imminently dangerous" act that showed a "depraved" lack of regard for human life. The charge carries a mandatory sentence of 25 years in prison and a maximum of life. The special prosecutor in the case, Angela Corey, has refused to explain exactly how she arrived at the charge. But in the affidavit, prosecutors said Zimmerman spotted Martin while patrolling his gated community, got out of his vehicle and followed the young man. Prosecutors said in the affidavit that Zimmerman "profiled" Martin, who was unarmed and wasn't committing a crime. "Zimmerman ... observed Martin and assumed Martin was a criminal," the affidavit said. Zimmerman felt Martin did not belong in the gated community and called the police. Prosecutors interviewed a friend of Martin's who was talking to him over the phone moments before the shooting. His parents' lawyer has said that Martin was talking to his girlfriend back in Miami. "During this time, Martin was on the phone with a friend and described to her what was happening," the affidavit said. The witness advised that Martin was scared because he was being followed through the complex by an unknown male and didn't know why. During a recorded call to a police dispatcher, Zimmerman "made reference to people he felt had committed and gotten away with break-ins in his neighborhood. Later while talking about Martin, Zimmerman stated 'these a------s, they always get away' and also said 'these f-----g punks,' said the affidavit, available at http://apne.ws/Itn7Nu .