Open Case File · S1-ARC3-WASH
Rinse
At a 24-hour automatic car wash tunnel, shift foreman Kim Ki-su was found dead, his chest and abdomen crushed between the conveyor and rotating brushes. That night he had walked into the tunnel himself, standing at the designated sensor position to assist with a pass-through test, and the human-detection safety interlock—which should have stopped the line the instant a person entered—never engaged during the cycle. The car wash remained open for business right up to the moment of the accident. Interrogate the five people entangled in this death and uncover why the hand that started that cycle turned it into a killing.
Scene
operating 24-hour automatic car wash tunnel · midsummer rainy season, late night
5 suspects
Baek Jong-gwanCar Wash Brand Regional SupervisorEarly fifties. Speaks in performance metrics and numbers, frames every conversation around liability first. When questioned, he pulls out brand manuals and tour schedules first to defend his position.
Shin Yu-anCar Wash Reservation/Settlement Records ClerkEarly thirties. Precise with records and speaks little. Doesn't volunteer words that would put others in difficulty, but when asked directly, says what was seen.
Jeong Byeong-ilWash/Detailing Technician (app-assigned)Late thirties. Speaks little and only what's necessary. Tends to follow app instructions and procedures literally, and when questions run long, silence runs longer than answers.
Lee Hae-gangCar Wash Grievance/Safety Report ClerkMid-forties. Soft-spoken and quick with paperwork. Retreats behind 'I forwarded it per procedure' for difficult questions, doesn't hold eye contact long.
Jo Dong-seokCar Wash Equipment/Machinery MaintenanceEarly forties. Taciturn but becomes talkative when equipment is discussed. Clearly distinguishes what his hands touched from what they didn't.
Exhibits
Car Wash Control Operations & Settlement Logs
Records from that day's car wash control console—a control panel with a screen—and settlement system. Reservation, wash, settlement, and pickup entries are complete without gaps, and on the surface no operational defects are visible.
Wash Cycle Initiation Record and Initiation Console
The wash cycle initiation record shows one pass-through test cycle initiation at the time of the accident. The night-shift closing and initiation sequence is slightly different from usual.
Office Building Parts Inventory Physical Verification Log
The parts inventory physical verification log from the car wash office building. A physical verification task was scheduled for late night on the day of the accident.
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Field Guide
One question = one turn. Examine the clues, shake statements with confrontations, question everyone, then accuse — there is no undo.
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