The Mystery of the Mystery: the Murderer Was Identified at the Beginning

(Ancient suspense investigation, no system, updated cases: "Double Chamber Murder", "Headless Horseman", "Mystery in the Haunted Mansion", "Curse of the Wolf God", "Jade Butterfly", more cases are being updated continuously) Shen Yichen accidentally traveled through time and became the thirteenth prince of Dayu! I thought I could start a glorious life in another world, Unexpectedly, as soon as he landed, he encountered a secret room murder case! What's even worse is that he is still the only suspect in this case... Bizarre secret room murder... The weird headless horseman… The terrifying ghosts of the snowy mountains… The terrifying life-threatening paper man... A series of mysterious cases followed one after another, and Shen Yichen was forced to get involved...