As of 2025, not only has the general investigative environment in society changed rapidly due to the revision of the Criminal Procedure Act, the Prosecutor's Office Act, the Act on the Senior Public Officials' Corruption Investigation Office, and the Police Organization Act over the past several years, but the military organization has also changed as part of the military law reform, with the abolition of the High Military Court and the investigation, indictment, and trial of soldiers and others by courts other than military-affiliated courts, general police, and prosecutors for a limited number of crimes. In this flow of change, the importance of cooperation and collaboration between military police and police, military prosecutors, and prosecutors in the investigation of cases is expected to increase further.

Ultimately, these precedents strengthen the principles of due process and human rights protection in the current judicial system and provide important guidance for ensuring that investigative agencies adhere to legal limits.
This can be seen as contributing to enhancing the fairness and transparency of criminal justice and having a positive impact on achieving a balance between uncovering the truth and protecting the rights of suspects.
In particular, it plays a significant role in enhancing the legitimacy of judicial procedures and the accountability of investigative agencies by making it clear that illegal evidence collection can be excluded from court proceedings.
--- p.22

In 2007, the Supreme Court made a landmark ruling regarding digital evidence in a case involving violations of the National Security Act (espionage, infiltration, escape, etc.) (hereinafter referred to as the “Ilsimhoe” case).
Until now, rulings on digital evidence have mainly been related to expert evidence, but starting with the 2007 Ilsimhoe ruling, terms such as "hard copy" and "imaging" began to appear in case law, and case law related to digital evidence began to emerge in earnest, dealing with requirements for the integrity and identity of digital evidence.
--- p.61

In the case where a series of actions, such as seizure, imaging, search, copying, and printing of storage media on-site during the process of seizure and search of electronic information, have been carried out and the seizure and search has been completed, and there is a quasi-appeal requesting the cancellation of individual dispositions at each stage by dividing the entire seizure and search process into stages and individually, whether the entire seizure and search process should be considered as a single procedure and the seizure and search disposition as a whole should be cancelled based on whether the illegality revealed in the process is serious enough to make the entire seizure and search procedure illegal (positive in principle) and the standards for judging the severity of the illegality at this time
--- p.113

However, another Supreme Court ruling (2020.
3. 19.
In Sentence 2019do14341), the evidentiary ability was acknowledged on the grounds that there was a connection with the basic crime. This is a case where it was ruled that if there is material related to a sexual crime other than the charge written on the warrant during the process of seizing and searching the cell phone of a sex crime suspect, it can be used as evidence. In this case, it was determined that there is an objective connection when the charge written on the warrant and the additionally confirmed crime are not only close in time but also have the same motive for the crime, target of the crime, means used, and method.
--- p.161

If the investigative agency selects information related to the facts of the crime through keyword or extension search among the information stored in the information storage medium, and then receives and seizes a file created by copying it in the same bit string format as the information storage medium (hereinafter referred to as an “image file”), the search and seizure procedure for the object of seizure is thus completed, and therefore, the investigative agency does not have to guarantee the suspect, etc. an opportunity to participate in the process of searching, copying, and printing the image file seized as above at the investigative agency office.”
--- p.223

Most of the evidence submitted in trial is in the form of storage media such as CDs or diskettes.
In particular, in modern society, most people use commercial electronic media such as smartphones and laptops for work and daily life, so it is natural that various crimes and lawsuits are loaded on such media.

--- p.286