- The voice data analysis model for voice phishing crimes, developed by the Ministry of the Interior and Safety, played a pivotal role in apprehending criminals on the ground.

- The Gyeonggi Nambu Provincial Police and the National Forensic Service collaborated to analyze the voices of criminals, finding clues to accomplices and unsolved cases. 

- The voice analysis model has been widely used among police agencies nationwide, which is expected to further accelerate the investigation of voice phishing crimes. 

The government's voice data analysis model for voice phishing crimes, developed for the first time in the world in February, is playing a key role in the investigation and arrest of voice phishing crimes. Therefore, it is expected that such crime-related investigations will speed up. 

On October 31st, the Ministry of the Interior and Safety (MOIS, Minister Lee Sang-min) announced that it had apprehended a total of 51 individuals, including the leaders of three voice phishing criminal organizations and their financial management personnel by using the 'voice phishing voice analysis model' (hereinafter referred to as the voice analysis model). The model was developed earlier this year and has been used to analyze the National Forensic Service (NFS) and police investigations.

The three arrested organizations were found to have established call center offices in domestic apartments and used personal information and burner phones to blackmail victims to “release their explicit videos,” extorting a total of 600 million won from them.

The Gyeonggi Nambu Provincial Police (hereinafter referred to as Gyeonggi Nambu Police) arrested five individuals for the first time in May during on-site inspections of repeaters that change overseas calling numbers used in voice phishing crimes into domestic mobile phone numbers starting with '010.’

Following this, the police initiated a full-scale investigation to establish the criminal charges of the apprehended suspects and identify related individuals. 

In particular, the police utilized the voice analysis model* distributed by MOIS in July during the investigation of the apprehended suspects to determine whether the voices of the arrested suspects and the voices obtained from the victims match.

*A police investigator from the Gyeonggi Southern Police completed MOIS’ training on the voice analysis model (July 11) and used the pilot analysis model.

According to the assessment results, the investigating officer who confirmed the identity of the individuals used this information to substantiate the suspects' charges. Simultaneously, he requested an in-depth analysis from the NFS to verify additional allegations against the suspect and to identify any accomplices.

The NFS used the voice analysis model developed this year to compare and analyze the voices of the apprehended suspects with over 13,000 recorded voices of voice phishing crime offenders that they possessed. 

As a result of 12 rounds of close cooperation and mutual analysis between the NFS and the Gyeonggi Nambu Police, they were able to confirm the relevance of 17 cases, including the “Overseas XX Call Center Organization Case,” which was previously classified as an unsolved case, and identify the related criminals.

Based on their analysis and the analysis results from the NFS, the Gyeonggi Nambu Police was able to quickly identify the suspects, accelerating follow-up investigations, including phone and bank account record inquiries, as well as the CCTV verification process.

As a result, it identified the suspects from three organizations, including the call center head, the fund management team, and the counselors. By the end of October, it had apprehended a total of 51 individuals, including 16 direct accomplices and other individuals involved in related crimes.

Currently, additional apprehension operations are underway for the suspects with identified charges, so the number of individuals arrested is expected to increase in the future.

MOIS and the police believe that using the newly developed voice analysis model played a decisive role in accelerating the investigation and apprehension process of voice phishing crime organizations.

In particular, the use of this analysis model has been highly significant, not only in arresting domestic voice phishing crime organizations but also in revealing previously unsolved overseas operation organizations, leading to the additional arrest of their members.

In line with this, the ministry plans to conduct regular training on the use of the analysis model twice a year and support the widespread use of the analysis model in various voice-related case investigations moving forward.

Minister Lee Sang-min commented, "The effectiveness of voice analysis in combating voice phishing has been confirmed through the apprehension of criminal organizations." He stated, "In the evolving landscape of voice-related crimes, we will continue to provide training and improve the model so that it can be widely utilized to swiftly apprehend criminals in various forms of voice crime investigations."

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