In the first part of this case, Ran, Sonoko, and Conan visit a university's school festival. They enter a haunted house attraction designed like an operating room, only for a real murder to take place during the "performance".
For viewers in specific regions like Thailand, TrueID hosts Season 13, explicitly listing Episode 626 with official audio. Episode 626 Recap: " The Screaming Operation Room (Part 2) " detective conan episode 626 link
The victim is found in a pool of fake blood, but the cause of death is far from a prop. In the first part of this case, Ran,