--- title: "Legal Challenges to Police Searches Nearly Triple in South Korea in Four Years" description: "Filings asking courts to void seizures rose from 130 in 2021 to 358 last year as defense lawyers use AI to hunt for procedural flaws" author: "rews desk" published: 2026-10-04T01:26:45.178Z modified: 2026-10-05T02:11:25Z url: https://rews.cc/a/legal-challenges-to-police-searches-nearly-triple-in-south-k-422de9 language: en tags: ["law", "politics", "ai", "crime", "judiciary", "world"] publisher: "Rews (https://rews.cc)" --- # Legal Challenges to Police Searches Nearly Triple in South Korea in Four Years *Filings asking courts to void seizures rose from 130 in 2021 to 358 last year as defense lawyers use AI to hunt for procedural flaws* By rews desk · October 4, 2026 · https://rews.cc/a/legal-challenges-to-police-searches-nearly-triple-in-south-k-422de9 ## In brief - Quasi-appeal filings challenging searches and seizures rose from 130 in 2021 to 358 in 2025, South Korea’s Supreme Court said - Filings jumped 116 cases, or 48 percent, from 2024 to 2025 alone - Lawyers say AI tools make it easier to comb tens of thousands of pages of investigative records for procedural errors - A court ruling that a seizure was unlawful can knock evidence out of trial and, if affirmed, blocks re-indictment on the same charge - The Prosecutors’ Office was abolished Friday and replaced by an investigation agency and a downscaled indictment service Court filings challenging police searches and seizures in South Korea have nearly tripled in four years, reaching 358 last year, as defense lawyers increasingly attack how investigators gathered evidence rather than the charges themselves, the Supreme Court reported on Sunday. The filings, known as quasi-appeals, ask a court to return seized items or invalidate a raid when investigators took materials beyond what a warrant allowed. Filings numbered 130 in 2021 and 242 in 2024, meaning last year’s total was up 116 cases, or 48 percent, in a single year, according to Supreme Court figures. When a court rules a seizure unlawful, the seized material is unlikely to count as evidence at trial, and where such a ruling leads to an acquittal that is upheld, prosecutors cannot bring the same charge again. Legal professionals say the strategy is most common among defendants with money and connections — politicians, senior officials and the wealthy — who can hire former-prosecutor lawyers and big firms able to comb through investigative records that can run to tens of thousands of pages and send lawyers to every raid. One former prosecutor turned defense lawyer described taking a drug case and focusing not on the allegations but on the search itself: whether investigators seized data beyond the warrant’s scope and whether the suspect got a chance to take part when officers copied his phone. In the past, he said, records were so voluminous that lawyers rarely read them all. “Now, finding whether there was anything illegal in the evidence-gathering process has become the ‘top priority litigation strategy’ for lawyers,” he said. AI tools that can analyze the records have made that far easier. Big law firms run forensic centers to hunt for flaws and hold seminars on illegally obtained evidence. One firm said lawyers with police or prosecution backgrounds watch each raid and object on the spot if they see a possible violation, so the objection goes into the record and can be raised in court later. The tactic slows cases down. If a suspect’s lawyer objects to individual files during a phone or computer forensic review, “a job that could be done in a day takes weeks,” said a former chief prosecutor who is now a defense lawyer, adding that forensic work sometimes halts entirely until a court rules on a quasi-appeal. Some lawyers also hold their objections until trial begins, on the theory that investigators tipped off early could shore up the evidence beforehand. “The worse the crime and the heavier the charge, the more wiping out the core evidence is almost the only defense strategy,” one firm official said. A former deputy chief prosecutor said election cases and cases involving senior officials tend to have long, complicated investigations, leaving more room to find procedural defects, and that authorities may hesitate to dig once a trial is underway. Prosecutors say they are outmatched. A trial prosecutor in Seoul said he must build his case on officers’ written records, so when a defense raises a point not in those records mid-trial, rebutting it is difficult. Courts now summon police officers as witnesses more often, and a judge said a claim of illegally gathered evidence means adding at least one or two hearing dates to a trial. The trend is poised to grow after the government [dismantled the 78-year-old Prosecutors’ Office on Friday](https://www.koreajoongangdaily.com/korea/korea-launches-scaleddown-prosecution-new-investigation-agency-in-major-reform/12902427) and split its work between a new Serious Crimes Investigation Agency and a downscaled Prosecution Service, which now only indicts and maintains indictments. One lawyer warned that prosecutors who never took part in an investigation will struggle to judge whether police evidence was gathered legally, and that with prosecutors’ power to order supplementary investigation abolished, responding to such challenges at trial “seems likely to get harder.”