The Outsider in Detective Conan

The bug that the murderer is Xiao Tong is really big. The drum washing machine is sitting between Xiao Tong and the deceased. Even if someone is sitting on the roller coaster in the dark, you will feel something on your head. As a detective, the washing machine should be more sensitive in this regard. And that piece of evidence, is a thread that goes through a necklace that long? It would take a few meters to put a loop on the deceased's head and hang the line on the track. It would be better to say that the person next to the deceased was Lily. She couldn't stand the deceased abandoning Xiaotong, so in order to avenge Xiaotong, she killed him with a special fishing line.