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‘Significant’ new evidence found in Illinois cop slaying

FILE - In this Sept. 3, 2015 file photo, Lake County Major Crime Task Force Cmdr. George Filenko, right, and Christopher Covelli of the Lake County Sheriff's office, address the media in Fox Lake, Ill. Filenko provided updates in the search for the suspects in the death of Fox Lake Police officer Lt. Charles Joseph Gliniewicz at another news conference on Friday Sept. 4, 2015 announcing that a $50,000 reward is being offered for the capture and conviction of those who killed Gliniewicz. (Steve Lundy/Daily Herald, via AP, File)  MANDATORY CREDIT, MAGS OUT
FILE - In this Sept. 3, 2015 file photo, Lake County Major Crime Task Force Cmdr. George Filenko, right, and Christopher Covelli of the Lake County Sheriff's office, address the media in Fox Lake, Ill. Filenko provided updates in the search for the suspects in the death of Fox Lake Police officer Lt. Charles Joseph Gliniewicz at another news conference on Friday Sept. 4, 2015 announcing that a $50,000 reward is being offered for the capture and conviction of those who killed Gliniewicz. (Steve Lundy/Daily Herald, via AP, File) MANDATORY CREDIT, MAGS OUT FILE - In this Sept. 3, 2015 file photo, Lake County Major Crime Task Force Cmdr. George Filenko, right, and Christopher Covelli of the Lake County Sheriff's office, address the media in Fox Lake, Ill. Filenko provided updates in the search for the suspects in the death of Fox Lake Police officer Lt. Charles Joseph Gliniewicz at another news conference on Friday Sept. 4, 2015 announcing that a $50,000 reward is being offered for the capture and conviction of those who killed Gliniewicz. (Steve Lundy/Daily Herald, via AP, File) MANDATORY CREDIT, MAGS OUT

FOX LAKE, Ill. (AP) – Authorities investigating the slaying of a northern Illinois police officer say they’ve recovered a new piece of “significant” evidence from the crime scene.

Lake County Sheriff’s Office detective Christopher Covelli says evidence technicians returning to the scene of Tuesday’s shooting in the village of Fox Lake made the discovery Friday afternoon.

He refused to reveal what it was, citing the ongoing investigation.

Police Lt. Charles Joseph Gliniewicz was slain Tuesday while pursuing three suspicious men on foot.

Covelli also told The Associated Press Saturday that technicians piecing together several videos have told investigators some of the images line up with the description Gliniewicz gave dispatchers of the men.

Covelli says that puts investigators closer to identifying potential suspects.

Residents and businesses have come forward with some of the videos.