The investigation into the shooting death of Florida teen Trayvon Martin continues to hit snags, as officials are now reportedly starting over.

 

The investigation, which has been the target of criticism since Martin was killed a month ago, has become so convoluted with so many leaks, that witnesses need to be re-interviewed, according to CBS News.

 

Police questioned Zimmerman for five hours the night Martin was killed. Zimmerman was reportedly "bleeding from the nose and the back of the head." Police went back to the scene with him to re-enact the shooting. They also interviewed six witnesses, none of whom actually saw the shooting happen.

 

The Sanford Police Department tried to bring manslaughter charges against George Zimmerman, the neighborhood watchman who admitted to shooting the unarmed Martin, for the first six weeks of the investigation. However, police were eventually told by the state attorney that there wasn't enough evidence to pursue charges.

 

Now, after mounting public pressure, a new special investigator has been assigned to the case who is reviewing the evidence and once again interviewing witnesses — "essentially starting from scratch," according to CBS. Meanwhile, George Zimmerman has still not been charged as he continues to assert that he acted in self-defense.