With a Golden Finger, I Turned from a Policeman to a Suspect

A corpse leads to an unsolved case from twenty years ago, and the protagonist Xiao Feng accidentally obtains a mobile phone that can connect to twenty years ago, and at the same time starts a conversation spanning twenty years. The dead come back to life? Is there someone else who is the murderer? Clues emerge step by step, and Xiao Feng approaches the abyss step by step. In the end, all the evidence points to him. The death of his relatives and the disappearance of his lover make Xiao Feng gradually collapse. "Am I a murderer? Did I kill my father?" When a policeman is named as a suspect in a murder case, and when everyone says he is a madman, how can he prove himself?