Tsujiei killed Tadami out of revenge. She had encouraged another friend, Hashiguchi, to record his own suicide for her twisted curiosity about death; Tsujiei blamed her heartlessness for Hashiguchi's actual demise. Key Episode Details Japanese Title: 絶叫手術室（後編） ( Zekkyō Shujutsushitsu - Kōhen Characters Present:
Detective Conan episode 626, "The Screaming Operation Room (Part 2)," centers on the murder of Anna Tadami within a university haunted house, revealing a dark motive driven by a twisted obsession with death. Conan exposes Sonsaku Tsujiei as the killer, who used a deceptive, staged convulsion involving his own feet to mimic the victim's movements and cover the forced poisoning. Watch the full episode on Plex . The Screaming Operation Room - Detective Conan Wiki
The culprit poisoned the tip of a surgical instrument that Anzu was known to hold during the simulation exercise. Because medical students often subconsciously touch their face or adjust their masks, the poison was accidentally ingested. The Culprit Revealed
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