Yes, been following this for a lot of years. I was really worried this wouldn't be solved until recently when the subjects in the second pic from the OP (father and son) came up and the son's interrogation transcript was leaked. He had a fake snapchat account used to get pictures of and meet little girls. He told a different person over snapchat he was supposed to meet up with Abby & Libby the day of the murders. I really thought Bridge Guy was going to turn out to be the Dad.
Richard Allen being arrested for 2 counts of murder. I don't think law enforcement has confirmed if they think Richard Allen was the guy on the bridge, which makes me believe the Klines could still be involved. You can be charged with murder for being an accesory, even if you didn't physically kill anyone. Cops are keeping the evidence air tight until this goes to trial. No matter what, that's got to be a relief for the family. 5 years, man. I can't imagine.