NBC News is reporting that the FBI has begun a “parallel investigation” into the shooting death of 17-year-old Trayvon Martin who was murdered February 26, just a few yards from his father’s home in Sanford, FL.

The teen, who was killed by 28-year-old George Zimmerman, was returning home from a local convenience store and was unarmed when he was killed. Since his death, millions have taken up his case and thousands have rallied at protests from Los Angeles and New York, to Sanford and London to continue to pressure law enforcement officials to arrest and prosecute Zimmerman for Martin’s death.

Martin’s parents claim police completely mishandled the case and have asked Federal officials to look into Sanford PD’s investigation. Monday, the FBI began their own investigation reportedly going door to door throughout the gated community and questioning witnesses.

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This news comes on the heels new developments uncovered about that fateful night. Although Zimmerman claims he was being viciously beaten by Martin, new reports indicate that police canceled an ambulance they called for Zimmerman before it arrived at the scene. Also, two forensic audio experts who have analyzed the 911 tapes concluded that the screaming voice was not Zimmerman’s at all.

Despite the grand jury gearing up to conviene on April 10, this new information continues to fuel calls for Zimmerman’s arrest.

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