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A detention warrant request is not the end of an investigation — in many cases, it is the moment that determines the direction of the entire criminal case.

In Korea, once prosecutors request a detention warrant, the court usually conducts a pre-trial detention hearing within approximately 48 hours. What happens during this short window can significantly affect whether the suspect remains free or is taken into custody.

Only 48 Hours to Prepare

A Korean pre-trial detention hearing (often referred to as a warrant review hearing) is a procedure where a judge directly questions the suspect before deciding whether detention is necessary.

Within this limited timeframe, the defense team must quickly:

• review the investigation status,
• meet the detained suspect,
• analyze statements and evidence,
• prepare written submissions,
• organize supporting materials, and
• develop a hearing strategy.

In practice, many detention decisions are heavily influenced by the preparation completed before the hearing even begins.
 

What Korean Courts Focus on in Detention Hearings

Korean courts generally evaluate three core issues when deciding whether to issue a detention warrant.

1. Risk of Flight

The court considers whether the suspect may avoid future investigation or trial proceedings.

Stable residence, employment, family ties, and long-term connections to Korea can become important factors supporting release.

2. Risk of Evidence Tampering

Judges also examine whether the suspect may destroy evidence, influence witnesses, or coordinate statements with related parties.

If major evidence has already been secured and the suspect has cooperated with investigators, these points may help reduce concerns about detention necessity.

3. Seriousness of the Alleged Crime

The court reviews the severity of the allegations, potential repeat offenses, financial damage, and overall case structure.

At the same time, factors such as victim compensation efforts, settlement discussions, remorse, or legal disputes regarding the allegations may also be considered by the court.

A criminal defense lawyer structures the defense strategy around these exact legal standards rather than relying on emotional appeals alone.
 

A Detention Hearing Lawyer Does Much More Than Attend Court

Effective defense in detention cases is usually built before the hearing date.

✔️ Immediate Client Interview and Statement Review

The lawyer meets the suspect as quickly as possible to understand the case structure, prior statements made to investigators, and any inconsistencies or legal risks that may affect the hearing.

✔️ Written Opinions and Supporting Materials

Defense counsel prepares written submissions explaining why detention is unnecessary.

These materials may include:

• proof of residence,
• employment records,
• family relationship documents,
• medical conditions,
• cooperation history,
• transaction records,
• contracts, or
• communication evidence relevant to the allegations.

The quality and organization of these submissions can directly affect the judge’s perception of the case.

✔️ Hearing Preparation and Statement Strategy

During the hearing, suspects are questioned directly by the judge. Answers given during this process can significantly influence the outcome.

An experienced lawyer helps prepare how key facts should be explained, which issues require caution, and how to maintain a consistent legal position throughout the hearing.

✔️ Planning for Possible Detention

Even before the hearing concludes, the defense may also prepare follow-up measures such as detention review requests, bail applications, or additional legal filings if detention is ultimately granted.
 

Early Defense Is Especially Important in Financial and Crypto-Related Cases

Cases involving cryptocurrency, investment disputes, fraud allegations, voice phishing, OTC crypto transactions, or financial crimes are often highly technical and document-heavy.

Simply claiming innocence is rarely enough.

The defense must clearly explain transaction structures, fund flows, business relationships, and the suspect’s actual role in a way the court can realistically understand within a short hearing.

In multi-party investigations, statements made by co-defendants or related individuals can also create additional risks at the detention stage.

For foreign nationals living in Korea or international business operators, these risks may become even more serious due to language barriers, visa concerns, or misunderstandings regarding Korean criminal procedures.
 

Detention Is Not a Conviction — But It Changes Everything

A detention warrant does not mean guilt has been proven.

However, actual detention can severely affect:

• preparation of the defense,
• business operations,
• employment,
• immigration status,
• family life, and
• psychological stability.

There is a substantial practical difference between defending a criminal case while free and defending it while detained.

If you have been contacted by Korean investigators or informed that a detention warrant may be requested, immediate legal review is strongly recommended.

The criminal defense team at Decent Law Firm handles detention hearings, financial crime investigations, cryptocurrency-related criminal matters, and complex economic crime cases involving both Korean and foreign clients in Korea.

Early action often shapes the outcome.