FOX LAKE, Ill. (WLS) -- The FBI is looking at new surveillance video Saturday that could help catch those responsible for killing Fox Lake police Lt. Charles "Joe" Gliniewicz last week.
The video came from a nearby gas station. The owner tells ABC7 Eyewitness News that you can clearly see the three suspects.
Meanwhile, the FBI tweeted out an appeal to the public Saturday asking for help and tips related to the slaying of the officer.
The mood is somber as a steady stream of the grief-stricken flock to the growing memorial outside the Fox Lake Police Department for Gliniewicz.
The long holiday weekend began with the three suspects believed responsible for the cop's killing still on the loose. Some residents remain concerned despite an increased police presence.
"We've always got police officers, we've got the SWAT teams. They're all around the whole neighborhood. I've already seen them twice in my neighborhood," Bernie Dodgen said.
Meanwhile, authorities have recovered security camera video from several area homes and businesses, hoping the recordings will provide some clues about the suspects.
"You can see the clear face of the people in my camera," said gas station manager Monty Sharma.
During the Labor Day weekend, the Chain O' Lakes normally draws thousands of visitors for a last chance at summer fun, but with the ongoing manhunt, tourist traffic is down and business is not the same at area eateries and marinas.
Tributes and tokens of admiration for the fallen officer are everywhere as the 30-year police veteran is being remembered for his selflessness and generosity.
"Everybody's grieving in their own way," said Fox Lake resident Kyle Navas. "He had a huge effect in the community."
The tip line phone number is 1-800-CALL-FBI. Tips, photos and video can also be submitted online: www.fbi.gov/foxlake.
FUNERAL PREPARATIONS UNDERWAY FOR SLAIN OFFICER
Gov. Bruce Rauner has ordered all state flags to fly at half-staff as people prepare to say their final goodbyes to Lt. Gliniewicz. Flags will fly half-staff from sunrise Saturday morning to sunset Monday evening.
Lt. Gliniewicz's funeral will be held at Antioch High School on Monday. Public viewing begins at 9 a.m., followed by a service at 1 p.m. There will be a procession from the high school to Hillside East Cemetery in Antioch, where Gliniewicz will be laid to rest.
MORE: Click here to view a map of the funeral procession route
Lt. Gliniewicz's funeral service and procession will be streamed live on ABC7Chicago.com on Monday.