After 3 weeks, more questions than answers in investigation of Illinois police officer's death

FILE - This undated file photo provided by the Fox Lake Police Department shows Lt. Charles Joseph Gliniewicz. Three weeks after the shooting death of Gliniewicz, investigators have only said what they don't know or what they know did not happen. "There are no developments," said Chris Covelli, spokesman for the Lake County Sheriff's Office. (Fox Lake Police Department photo via AP, File) (The Associated Press)

In this May 1, 2013 photo Lake County Coroner Dr. Thomas Rudd poses for a photo at his office in Waukegan, Ill. Three weeks after the shooting death of Fox Lake Police officer Lt. Charles Joseph Gliniewicz, investigators have only said what they don't know or what they know did not happen. Rudd, said a furious Lake County Major Crime Task Force Cmdr. George Filenko in a statement, had put "the entire case at risk" by releasing that information. (Stacey Wescott/Chicago Tribune via AP) (The Associated Press)

CHICAGO – Three weeks after an Illinois police officer was shot to death, investigators have revealed little about their investigation.

Authorities say they are still awaiting lab tests in the death of Charles Joseph Gliniewicz, despite the urgency with which police slayings are usually handled.

The coroner says he has been unable to rule the case a homicide, a suicide or an accident — a stance that has deepened longstanding tensions between him and local law enforcement in the village of Fox Lake.

Police have made no arrests or identified any suspects. The apparent lack of progress leaves the public in the dark about whether there's a killer on the loose.

The coroner and the chief investigator were to meet in person this week for the first time to discuss the matter.