Whoa okay. So I made an account here just to post a reply to this, so I'm sorry if I'm doing thing wrong. I had a conversation with some friends earlier which reminded me of this case so I did some googling and ended up here and saw recent-ish comments which surprised me since I know this is an older case.
I grew up in elementary and middle school playing with Joshua. I have year book pictures and everything if there's any doubt. My best friend, I'll call B, used to live just a few houses down the street from him, and I went over to B's almost daily and we always ended up hanging out with Josh. I lived a few streets over at the time (Juanita Ave if you look on google maps). I remember one specific event where we went to hang out at his place, and his family had this huge pile of lumber that we were climbing on top of and there were beetles (horned beetles I think?) all over it. I remember thinking they looked really cool but I didn't want to touch them but Josh was holding and playing them, letting the beetles crawl over his hands and holding them out to us to look at. I think he expected us to be grossed out but we weren't, then suddenly he just started smashing them over and over. Any he could find just stomping on them or hitting them with his hand and laughing. We got super creeped out and went home, and I think at the time we just justified it as weird boyish behavior.
Once we hit middle school we slowly drifted apart and then I moved far away right before high school. I stayed in touch with my friend B and one day (maybe 2011?) she calls me and asks me if I remember Josh and of course I do, and she tells me that he killed a woman, possibly two, maybe more. I was shocked. It's always been in the back of my head since and maybe once a year I'll google the story to catch up on details.