Written by Attorney Soobin You — a former prosecutor licensed in Korea, now defending clients in criminal cases with consultations available in English.
Quick answer: The police in Korea cannot hold you indefinitely after an arrest. If investigators want to keep you in custody, a detention warrant must be requested from a judge within 48 hours of the arrest, and if it is not requested within that time the Criminal Procedure Act requires your immediate release. What happens inside those 48 hours — above all what you say, and whether a lawyer is present when you say it — shapes everything that follows.
For a foreign national, the first hours after an arrest in Korea are disorienting in a specific way: the procedure is moving quickly, in a language you may not follow, and nobody stops to explain which parts of it are still open to argument. Many of them are. This guide sets out what Korean law actually requires during that window, and where the decisions that matter are made.
Why 48 hours is the number that matters
Korean criminal procedure separates two things that English tends to merge. 체포 (arrest) is a short custodial measure. 구속 (detention) is continued custody, and it requires a judge.
Article 200-2(5) of the Criminal Procedure Act provides that where investigators wish to detain an arrested suspect, a detention warrant must be requested within 48 hours from the time of arrest, and that if it is not requested within that period the suspect must be released immediately.
So the 48 hours are not a waiting period. They are the window in which investigators assemble the material they will put in front of a judge — and if nothing is said on the other side, the only account in that file will be theirs.
The three ways a person is taken into custody — and why the clock is the same
An arrest in Korea usually happens in one of three ways: on a warrant obtained in advance; as an emergency arrest, where the grounds are urgent and a warrant could not be obtained first; or as an arrest in the act, where the person is caught during or immediately after the offence.
The 48-hour limit reaches all three, but by different routes. For a warrant arrest it comes from Article 200-2(5) directly. For an emergency arrest, Article 200-4(1) sets the same 48-hour limit for requesting the detention warrant. And for an arrest in the act, Article 213-2 applies Article 200-2(5) mutatis mutandis where a prosecutor or judicial police officer arrests a person in the act or takes delivery of one. The route matters if the lawfulness of the arrest itself is later challenged; the deadline does not change.
What you must be told before you answer anything
Article 244-3(1) requires that, before questioning a suspect, the prosecutor or judicial police officer inform them of four things: that they may decline to make any statement, or decline to answer particular questions; that declining will not be held against them; that a statement made after waiving the right to remain silent may be used as evidence of guilt in court; and that they may have defence counsel present during questioning and receive a lawyer’s assistance.
The third of those is the one people underestimate. The right to remain silent is not the interesting part — the interesting part is that once you waive it, what you said becomes evidence, in a written record, in Korean, that you will not be able to unsay.
Having a lawyer in the room
Article 243-2(1) provides that where the suspect, or their counsel, legal representative, spouse, direct relative or sibling requests it, the investigator must allow defence counsel to be present at the suspect interview absent legitimate grounds (정당한 사유) to refuse. The statute does not enumerate what those grounds are, which is precisely why the request should be made clearly and early rather than raised as an objection afterwards.
And a lawyer is not an interpreter. An interpreter converts your words; a lawyer tells you what a question is aimed at and what your answer will mean once it is written into the record. That distinction is the whole subject of our guide to what a Korean police investigation actually involves.
The right most foreign nationals are never told about
Under Article 36(1)(b) of the Vienna Convention on Consular Relations, a foreign national who is arrested or detained must be informed without delay that they may ask for their consular post to be notified. Korea is a party to the Convention.
The Supreme Court of Korea addressed the consequences of a failure to give that notification in a decision of 28 April 2022. It is worth being precise about what the Court did and did not hold. It did not hold that evidence obtained after such a failure is automatically excluded. It examined the nature and degree of the procedural violation, together with the other protections the defendant had in fact received, and on the facts of that case the evidence was admitted. What the decision establishes is that the notification is a real obligation whose breach is assessed on the facts — not that it is a switch that ends a case.
It is also worth being clear about what a consulate can and cannot do. It cannot secure your release, act as your lawyer, or pay for one. It can confirm where you are being held, notify your family, provide a list of local lawyers, and observe how you are being treated. That is limited, but in the first day it is not nothing.
If a detention warrant is requested
Where a warrant is requested, the suspect is brought before a judge who questions them in person before deciding. This is the first point at which someone other than the investigators speaks to a decision-maker about the case — and it turns largely on two things: how serious the alleged offence appears on the file as it then stands, and whether there is reason to think the suspect will flee or interfere with evidence.
For a foreign resident the second question carries particular weight, and it is answerable with documents: a registered address, an employment or study record, family in Korea, a valid residence status. None of that helps if nobody puts it in front of the court in time.
Review of an arrest or detention
Article 214-2(1) allows a review of the lawfulness of an arrest or detention to be sought from the competent court. The application may be made by the arrested or detained suspect, or by their counsel, legal representative, spouse, direct relative, sibling or family member, a person living with them, or their employer. For someone detained alone in a foreign country, that last category matters: a company in Korea can act when relatives abroad cannot.
What a family member outside Korea can do today
Three things, in order. Establish which police station is holding the person and under what alleged offence — a consulate can help with this. Instruct a lawyer in Korea who can attend the interview rather than only advise afterwards. And gather the documents that answer the flight-risk question, because they are needed within days, not weeks.
This is the reason our criminal defence practice for foreign nationals in Korea is organised around the investigation stage rather than the courtroom. By the time there is a trial date, the record the trial runs on was written weeks earlier.
This article explains what the law requires during those hours. If what you need right now is the practical sequence — what to say, what not to sign, who to contact first — start with arrested in Korea as a foreigner: what to do first.
Frequently Asked Questions
Q: How long can the police in Korea hold me after an arrest?
A: Where investigators wish to continue holding you, a detention warrant must be requested from a judge within 48 hours of the arrest. Article 200-2(5) of the Criminal Procedure Act requires your immediate release if it is not requested within that period.
Q: Does the 48-hour rule apply if I was caught in the act?
A: Yes. Article 213-2 applies Article 200-2(5) mutatis mutandis where a prosecutor or judicial police officer arrests a person in the act or takes delivery of one, so the same deadline runs.
Q: Can I refuse to answer questions at a Korean police station?
A: Yes. Article 244-3(1) requires that before questioning you be told that you may decline to make any statement or to answer particular questions, that declining will not be held against you, that a statement made after waiving the right may be used as evidence of guilt, and that you may have counsel present.
Q: Can a lawyer be present during the interview?
A: Article 243-2(1) provides that on the request of the suspect or certain family members, counsel must be allowed to participate in the interview absent legitimate grounds to refuse. This is separate from having an interpreter.
Q: Will my embassy be told that I have been arrested?
A: Article 36(1)(b) of the Vienna Convention on Consular Relations requires that you be informed you may ask for your consulate to be notified. If that is not done, Korean courts assess the nature and degree of the violation rather than excluding evidence automatically — the Supreme Court took that approach in a decision of 28 April 2022.
Q: What is the difference between 체포 and 구속?
A: 체포 is the initial arrest, a short custodial measure. 구속 is continued detention and requires a judge to issue a warrant. The 48-hour rule governs the gap between the two.
This article is general information about Korean criminal procedure and is not legal advice. Outcomes depend on the specific facts of each case, and statutory provisions are subject to amendment. For advice on your situation, consult a licensed attorney.
Arrested or detained in Korea, or acting for someone who is? Attorney Soobin You provides English-language criminal defense from the first police contact, with offices in Seoul (Mapo) and Gyeongju. Contact us via KakaoTalk or the inquiry form.
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