Open Case File · S1-ARC4-DOCK
The Empty Dock
At Haeryang Shipyard's Dry Dock No. 3 lower inspection passage, subcontractor insulation worker Kang Yun-do was found submerged. That night he was on the lower-level work roster assigned by a labor-placement office, and for days he'd been threatening to report that office's ledgers to the authorities. The dock was still in normal operation right up to the incident, and after the lower level was logged as 'unoccupied,' the scheduled flooding sequence began exactly on time—a process that always checked for personnel first, but that one time ran with a man still inside. Interrogate the five people entangled in this death and determine whose hand locked the lower passage door that night.
Scene
lower inspection passage of an active shipyard dry dock · early winter fog, late night
5 suspects
Hwang Ki-taeprime contractor maintenance team subcontract manager50s. Fast talker with loud voice, addresses every question starting with contracts and liability. When pressed, opens file folders and official documents first to defend his position.
Ha Gyeong-minlabor-placement office shipbuilding division grievance/safety report handlerEarly 40s. Cautious speech, fast document processing. Retreats behind 'I only followed procedure' to difficult questions and doesn't hold eye contact long. When the topic of shipbuilding division personnel shrinking while night callouts increase comes up, suppressed anxiety bleeds into voice.
Bae Seung-wondry-dock maintenance subcontractor crew foremanMid-40s. Brief speech, doesn't raise voice. Precise point-by-point on process and procedure talk, clearly separates what his crew handles from what it doesn't. Often says night work has increased lately and he's tired.
Park Tae-seondock pump room equipment technicianLate 40s. Taciturn but talk lengthens when equipment comes up. Clearly separates systems his hands touch from those they don't, and voice roughens over field practices.
Noh Seon-judock flooding/drainage process recorderEarly 30s. Few words, no gaps in records. Doesn't volunteer topics that would become difficult, but if asked directly states what's written in the register.
Exhibits
Labor-placement office crew handwritten ledger inspection copy
Inspection copy of the crew handwritten ledger voluntarily submitted to investigators by the labor-placement office that deployed Kang Yun-do. Work dates, crew assignments, and wage-receipt signatures are filled in without gaps, and no surface deficiencies are visible.
Dock No. 3 lock register and flooding process record
Dock No. 3 lock register and flooding process initiation record. Lower passage watertight door lock at 23:22, flooding initiation at 00:30, with no unlock record between.
Dock No. 5 pump room drainage pump test-run record
Night inspection record from the same shipyard's Dock No. 5 pump room. Drainage pump test-run work was scheduled for late night on the day of death.
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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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