this is what I wrote in DCTP:
''I bet it's the culprit! I have this strong feeling from all that's happening that the culprit is kan-chan's supposedly dead childhood friend!!! Takeda did indeed shoot him, but he survived and had his death report faked somehow. He killed takeda for his long awaited revenge and has a grudge against the whole former takeda division(including Kansuke) for trying to kill him that time. Kansuke started to get suspicions about his childhood friends supposed death and wanted to investigate this personal matter alone! Meanwhile, his childhood friend was planning to...
...to frame kansuke for all the murders so he dressed up in the manner in which he would be identified as kansuke and made sure the police got a fake testimony! He killed kano, the moment after kano realised the childhood friend was alive(after reading the the case files from 9 yrs ago). The targets he meant when sending a text message for the police to see ("Only three woodpeckers left") was Akiyama(who died later in the chapter), Saegusa(who's left), and then lastly, his scapegoat...his childhood friend Yamato kansuke, who's gonna take the blame for the murders to the grave(staged suicide). But following the DC cliché, yamato is gonna confront him with the resolution of his investigations (after saegusa is killed) first and then conan will join in the talk and save kansuke, who fails to convince his friend to surrender.''