Sanford , Florida ( CNN ) -- A case involving the fatal shooting of an unarmed Florida teen , which has sparked outrage and calls for justice , is in the hands of the state attorney 's office . Police say Trayvon Martin , 17 , was returning from the convenience store to the home of his father 's fiancee in a gated community in Sanford , Florida , around sunset on February 26 . A neighborhood watch captain , George Zimmerman , 28 , saw the teen and called 911 to report a suspicious man , authorities said . The 911 dispatcher told Zimmerman not to confront Martin , but by the time police arrived , the teenager lay dead with a gunshot wound in the chest , said Bill Lee , the Sanford police chief . He was carrying a small amount of cash , some candy and an iced tea . Zimmerman told police he shot Martin in self defense , authorities said . `` When you add it up , it just does n't even make sense , '' said Ben Crump , the Martin family 's attorney . `` Trayvon Martin , a kid , has a bag of Skittles . ( Zimmerman ) had a 9 mm gun . Trayvon Martin did n't approach George Zimmerman , George Zimmerman approached Trayvon Martin . So how can he now assert self defense ? '' A gunshot can be heard on the 911 calls recorded that night , police said . The Martin family has sought to make the tapes available , but State Attorney Norm Wolfinger said Tuesday the calls will not be made public until the investigation is complete . `` Trayvon Martin and his family , interested persons , and the public-at-large are entitled to no less than a through , deliberate and just review of the information provided , along with any other evidence that may or may not be developed in the course of the review process , '' Wolfinger 's office said in a statement . `` We intend to honor that commitment . '' The shooting has sparked an outrage in the community , with some accusing Zimmerman , who is white , of profiling the black teenager . iReporter : 'Unconscious racism ' behind shooting ? Numerous CNN attempts to contact Zimmerman were unsuccessful , and it is unclear whether he has retained an attorney . Police said they have not charged him because there are no grounds to disprove his story of what happened . `` The evidence and testimony we have so far does not establish that Mr. Zimmerman did not act in self defense . We do n't have anything to dispute his claim of self-defense , at this point , with the evidence and testimony that we have , '' Lee said . Lee said the 911 directions asking Zimmerman not to confront the teenager are not mandatory instructions . `` That is a call taker making a recommendation to him . He 's not under a legal obligation to do that , so that is not something we can charge him with , '' he said. `` But it would have been a good outcome ... if Trayvon Martin and George Zimmerman never came in contact with one another . '' In a letter sent to U.S. Attorney General Eric Holder , the NAACP expressed doubt in the Sanford Police Department and asked the Department of Justice to review the case . `` The NAACP has no confidence that , absent federal oversight , the Sanford Police Department will devote the necessary degree of care to its investigation . We therefore call upon you to detail personnel to Sanford immediately to review the facts , ensure that the Sanford Police Department conducts an impartial , thorough and prompt investigation of the circumstances involving the death of this unarmed teen , and ensure that the responsible person is held accountable if a crime was committed , '' the letter said .
Trayvon Martin , 17 , is fatally shot during a neighborhood watch . Police say George Zimmerman , 28 , saw the teen and called 911 . By the time police arrived , the teen was dead with a gunshot wound in the chest .