Jang Yun-gi's case, involving a Gwangju high school girl, spurred the 'sangpije' system for police families
This incident prompted then-presidential candidate Lee Jae-myung to order a complete review of investigative practices, initiating discussions on the 'sangpije' system to prevent police misconduct.
This strengthened the argument that investigators from the relevant police station should be excluded from cases involving police family members to ensure fair investigations of internal police corruption.