North American Detective, I Can Only Do Physical Exorcism

"Sir, with all due respect, where is your cross? Where is the Bible? Where is the holy water?" "How can exorcism be such an inconvenient thing? Haven't you heard that when a bullet passes through the intestines, God sits in the heart?" "But..." "Stop it, I'll leave that big guy with the burning head to you. You go up first. Don't worry, I'll hold you back here to prevent them from taking your back." "Huh?" … In a dark alley. Jack Li walked out carrying a spine. At the other end of the spine is a huge sheep head. Jack Li let go of his spine and sat down on the sheep's head. He solved a case again. The question now is how he can prove that this sheep head was still a person an hour ago. [A little reasoning + a little ketchup + kung fu and singing and dancing + Ash fights demons]