I am also a local. While I haven't been to the old cement factory, I've been a patient (well, my animals have) at Fox Lake Animal Hospital since I was a child. There's a wooded area right behind the animal hospital (I guess really in front of it, since the wooded area is across the parking lot from the vet's front door) & every time I've had to take one of my dogs there to go potty, I've thought about how creepy & isolated it feels.
IMO, there is absolutely no way the Lt. took his own life. I did not know him personally, but I know many people who did. There is not a single person on the street here who thinks this was a suicide.
I'm not LE, nor am I into the drug scene, but I've heard that Fox Lake has been having some drug problems lately. I suppose what small town doesn't, though...
Also, Fox Lake is not upscale. It's home to working class people & a place where many go for water recreation when the weather is nice. There are also several bars there. It has a rural, small town feel, IMO.
I believe the killers are locals who somehow managed to slip back into their regular lives & elude the manhunt. I hope once forensics come back, that LE will have more to go on.
I've also wondered if it might be teenage perps, what with the high school being so close by, & with the odd time of day for people to be out acting suspiciously.
The police here are good, dedicated people. They will find these perps. It's just a matter of time. They are smart, too, & know their work. (I agree that the dumb reason given for not being able to view the video was a stall tactic. I'm sure they've seen the video. No doubt.)
Rest in peace, Lt. Justice is coming in your honor.