There is no tangible, physical evidence. The only things that can place them there are the words of the girls, the words of a jailhouse snitch who has recanted and Jessie's worthless confession.
The only physical evidence, such as it is, that even maybe sorta just-a-little pointed to the wm3 were fibers on Damien's clothing found during a search that were microscopically similar to those of the clothing of one of the boys. Came out in trial, however, that those same fibers were also microscopically similar to nearly half of the apparel in the local Walmart. Guess where most people in West Memphis shopped, since there wasn't really anything else in town? So physical evidence, sure, but hardly conclusive.
All the documents posted to callahan, I think, are legitimate but do not implicate wm3. Yes, Damien had extensive psychiatric history. Yes, he had a violent encounter with the ex boyfriend of a previous girlfriend. Yes, Jessie confessed just as many times as he recanted, but his information was mostly false and inconsistent with the known facts. His confessions were, however, consistent with the whole satanic panic notion and the cause of injuries as investigators believed them to be at the time. Fast forward using bonafied experts and Occam's Razor, we now know most of the injuries Jessie explained as assault were from animal predation.
The focus of one parent to the next is actually logical. You start with the family always because in the death of a child, that's where you find your perp about 90% of the time. It's not a smoke screen generated by the blindly supportive.........it's investigation 101.
The wm3 are innocent. As for the guilty, well, we'll probably never see a conviction, but look at the person who would have been viewed by them as an authority figure, has a history of violence, a reason to intensely dislike at least 1 of those kids, anger problems, the sociopathic confidence to hide 3 bodies in the drainage ditch, possibly in broad daylight OR at least had a place to hide them until he could do it at night. Sound like 3 high school kids living in trailer parks with their families? Nah.
Oh, and Marion is within walking distance of West Memphis. Few short miles down a service road along the interstate. Damien did reside in both towns easily, but was usuaaly at Domini's in Marion.