Here is what I think is going on, but take it with a grain of salt because I don't have the full evidence organized to back this yet. I am only going to cover up to 915 because I haven’t paid much attention to the spoilers. Roughly, Kuroda Hyoue is the murderer, but he isn't the actual Kuroda Hyoue. Kuroda Hyoue who got in an accident 10 years ago and put into a coma is currently dead (maybe). The real Kuroda Hyoue's body was swapped with that of the either Kansuke's childhood friend or the bank robber for reasons I don't know yet by someone I am not sure of but strongly suspect is Takeda based on the conversation with the murderer at the beginning of 913. As for evidence Kuroda Hyoue is the murderer: • Kuroda Hyoue is the best manipulation position. He orders the other police around, and they inform him of his whereabouts. I am pretty sure being able to make sure the suspects are in the right place at the right time is necessary for these murders to work. (Will work out the details of this later) He also has first access to the crime scene. • It seems strange how subdued the reaction is at the station to the murdered officers. When a police officer was suspect at the Tokyo met, it was tense from the bottom to the top of the ranks. Has Kuroda being keeping his superiors abreast of the situation? • Kuroda Hyoue seems to be letting Kansuke run around freely while suspecting him. • I am still a little fuzzy on the timeline, but I don't think he has a firm alibi for any of the crimes. I don't have any direct evidence that Kuroda Hyoue is one of the suspects from the past, but it's a pretty strong hunch based on the information we were given. The swap is possible because Hyoue's face was bandaged so that people and even the nurses weren't really clear what he looked like. It was noted that he seems really different, he also looks different, and the memory loss gives him an excuse to cover for knowledge inconstancies. It was also a point that the coroner said the two dead suspects were both criminals. The rule of no useless information seems to be standard for a lot of Gosho cases – why were we given so much info about Kuroda's hospital stay situation and how much he has changed? The rope used to hang Kano both feels weird and looks weird according to both Kansuke and Akiyama. It definitely looks weird because it was made of multiple short segments tied into loops (odd for someone doing a hanging not to use a single stretch), but that doesn’t explain the feels weird part. It occurs to me the rope might have been cut from the stretchy rope used for rehabilitating legs and knees – something Kansuke would have, use, and have his fingerprints all over. That would also explain the loops because rehabilitation ropes for legs are only so long, so you will need several segments. If Kansuke's rehabilitation ropes went missing, it would explain why he wasn't practicing that morning at the scene of the crime. Also a few other notes: Morofushi is pretending to be unfriendly with Kansuke and act like he is not Kansuke's childhood friend. I suspect this is so that so he can be trusted by Kuroda and the other suspects. I suspect the Woodpecker gang is a group of police which cooperates with thieves in exchange for bribes. They tip off gangs to upcoming investigations or help them commit crimes. I suspect the robber group mentioned earlier in this case was tipped off to the upcoming raid on their safehouse. Also I believe the woodpeckers are Akiyama, Saegusa, Kano, Takeda, and possibly the original Kuroda Hyoue, and the bank robber. The culprit who says there are three woodpeckers left probably counts Kansuke and Saegusa, but who is the last one? It might be Kuroda Hyoue.