of CNN's editorial staff repeatedly reviewed the tape but could reach no consensus on whether Zimmerman used a slur. Angela Corey, the special prosecutor assigned to investigate the case, said Tuesday that investigators would look into the allegations that Zimmerman used a racial slur. Martin, who lived in Miami, was visiting Sanford after receiving a 10-day suspension from school, a family spokesman has said. An empty plastic bag found in his book bag was determined to contain marijuana residue. Crump, Martin's parentsattorney, said information regarding the suspension was irrelevant and amounts to a smear campaign against the youth. Florida law allows the use of deadly force anywhere a person feels a reasonable fear of death or serious injury. It has been cited in a number of justifiable homicide cases in Florida. But as more and more information surfaces, the picture of what happened becomes more complicated. Despite the twists and turns in the case Fulton, Martin's mother, says she still has faith in authorities investigating her son's case. I feel confident that they 're going to do a thorough investigation, Fulton said. We 're trying to be patient, even though it's been over a month. We 're trying to be patient, and we 're trying to press on for justice. CNN's Umaro Djau, Deirdre Walsh, Ed Payne and Tracy Sabo contributed to this report. Watch Anderson Cooper 360 °