South Korea strips prosecutors of investigative power as two new agencies open

Under the old design, Democratic Party floor leader Han Byung-do said, prosecutors "held both investigative and indictment authority in one hand and wielded it at will" ^[5]. Since October 2, the evidence in a serious case is gathered at the Serious Crimes Investigation Agency and the charging decision sits with the Public Prosecution Agency ^[1][3]. Han said "the state's investigative function is perfectly intact" ^[6]. He also said the People Power Party "claims an era of a policing vacuum is coming, where perpetrators run free and victims hide" ^[4].

If the handoff between the two agencies works, the opposition's warning fades; if files stall between them, the warning gets its evidence; and if the ruling party keeps redrawing the structure, the October 2 setup is an interim one. I think the third is closest, though the target is narrower than the launch-day language suggests. Party leader Kim Min-seok said the party would "swiftly overhaul and establish the relevant laws and organizational structures so that the new criminal justice system of strict separation between investigation and prosecution can take root" ^[10]. He named the abuses right after promising checks on police investigations, and they included "burying cases, closing them without authorization, concealing and fabricating evidence" ^[12]. The new investigative capacity he described goes to the police ^[11]. The split itself comes out of a long-standing Democratic Party effort ^[9], and none of the specifics Kim gave would return investigation to prosecutors.

The counter-case comes from inside the party. Supreme Council member Lee Sung-yoon said he would "see through to the end the prosecution reform of separating personnel and settling past wrongs, along with the institutional separation of investigation and prosecution that we promised to the public and to party members" ^[7]. Separating personnel is a question of who staffs the agencies, and Lee has already opposed the nominee chosen to run the investigative one ^[8]. A fight over staff and leadership could reopen the agencies even if their powers stay where they were set on October 2.

Crypto Briefing put a price on one political outcome: 5.2% on a prediction market for President Lee Jae-myung's arrest before 2027 ^[13], or 94.8% against ^[15]. The publication read that as a lower likelihood linked to weaker prosecutors ^[13]. The 5.2% is a level recorded after the reform. Showing that the reform moved it would take a price from before October 2.

Neither report lists the offences assigned to the Serious Crimes Investigation Agency, so this material does not establish whether corporate fraud or securities cases now start there. My view is that the next round of legislation targets police oversight and the two-agency split holds. That view is wrong if the Democratic Party's follow-on bills rewrite the agencies' remits or hand investigative tools back to prosecutors.