Corpse Evidence

I delivered food late at night, and the customer died tragically at home. I fainted at the customer's house. When I woke up, the customer was turned into a pig-headed corpse and sitting on the sofa. All the evidence pointed to me as the murderer. Who wanted to frame me? The forensic doctor who performed the autopsy on the deceased discovered a shocking secret, but secretly found me. As a result, the forensic doctor died at the murder scene that night, and the body was cut into pieces and stuck to the wall. What on earth did he want to tell me? The most bizarre and heart-stopping thing is that there are clues on every corpse. How can we use these evidences to find and catch the real murderer? The pig head corpse case, the toad corpse case, the red thread corpse case, the cat eating the dead case, each case will shock you to the point of fear, hush, listen, the corpse is talking!