Baltimore Police Detective Shot In Head With Own Gun Day Before Grand Jury Testimony

The Baltimore police and the FBI do not have any evidence to suggest that Suiter's slaying is "part of any conspiracy," according to Davis. But he added "there's nothing we won't consider" and said he understands why there is speculation.

"It certainly makes for great theater," Davis said.

The federal grand jury is investigating a group of Baltimore officers who worked together on a firearms crime task force and have been charged with stealing money, property and narcotics from people over two years. An indictment has described the members of the Gun Trace Task Force, a small unit dedicated to getting illegal guns off Baltimore's streets, as using their position to allegedly threaten the innocent, detain people on false pretenses and steal their money. They are also accused of faking police reports, lying to investigators and defrauding their department.