Investigators say three men seen in a video from a home near where a northern Illinois police officer was fatally shot were not involved in the slaying.
The announcement puts to rest what authorities said was a promising lead into the identities of the suspects in last week's killing of Fox Lake Police Lieutenant Charles Joseph Gliniewicz.
Investigators questioned the three men in the video and are confident they were not involved in the slaying.
Investigators are working to identify DNA from an "unknown donor" found at the scene.
Gliniewicz was found shot to death Sept. 1 in a remote area shortly after he radioed that he was pursuing three suspicious men.
