I am a little late here but I hadn't seen this thread yet.
I am from Picher and remember when this happen. I am friends with Jennifer's cousins and so I have heard that the family does't think that Jermey Jones was involved, however that was what I heard about 4 or 5 years ago. But he did live next door, and did go on to kill many others.
Someone mention the family friend, well the friend of Justin's. I know the day of the funeral he was acting really more upset than most. I witnessed this myself, I also know that it was mentioned even then that the friend might have had something to do with it. I am in no way saying he did or didn't. Even being a high school student I thought he was behaving over the top.
I know the rumors was all about the husband. I have heard that he was cleared and other times I have heard it wouldn't be so hard to forge his time card, but I do think that he had many witnesses putting him at work. (a weird fact, a year or so later the husband started dating the owner's daughter of the duplex him and Jennifer lived in at the time of her murder)
The KBI weren't the best of investigators either, even though it was in the early days of DNA. I am not too sure if they found anything that might be checked now. I do know the Bryans have been very vocal in the way the KBI either hasn't recheck the evidence or if it was tainted at the crime scene.
A day after her murder the grandmother was made to scrub the blood from the crime scene, I am not saying the KBI failed this investigation but I am not saying that they were the best of investigators.
I have always heard the rumor that either Jennifer knew of a drug ring or seen something she shouldn't and that was the reason she was killed. But Baxter is a small town, so other people would have to have known about the same thing too. I know her murder was overkill and she had complain how someone scared her at her job, so much she asked people to stay with her. I do know someone was also pounding on the door and she was scared. I think her murder was personal and such overkill. I had heard that people who had signs up "justice for jennifer" in their yards would randomly have them taken down, ran over or broken in some way. I remember all that this family has went through and cannot even begin to tell you how much they just want justice.