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This is the news of a doctor's room investigation that dealt with sexual exploitation videos. Dr. Bang's gang earned crime profits in cryptocurrency, but the situation was caught by using a Finnish over-the-counter exchange for money laundering and avoiding tracking by using and changing the account to receive the cryptocurrency once.

Reporter Jung Ban-seok reports alone.

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Police confirmed the situation in which Jo Zubin, who received admission to the doctor's room for cryptocurrency, used the Bitcoin OTC exchange in Finland to commit crimes.

The exchange is an intermediary where individuals can exchange bitcoin and cash directly.

Paid members may have been used as a window for paying admission to the doctor's room or for money laundering.

They even used foreign exchanges to outsmart the investigative agency, and this technique also appears in wallets that accept cryptocurrencies, that is, account usage.

As a result of SBS tracking the flow of funds from three blockchain security companies and three PhD wallets, it was confirmed that between August and September last year, 200,000 won, 300,000 won, and 1 million won worth of bitcoins were deposited.

After receiving the cryptocurrency only once or twice per wallet, the bitcoin deposited was transferred to another wallet 2-3 days later and then scattered into thousands of wallets.

[Patrick Kim / CEO, Blockchain Security Company: It seems to be a general method of money laundering. Cryptocurrency seems to be in line with the regulatory gap, as regulations on anti-money laundering laws are not enforced (until the amendment was put into effect).]

As Cho's cybercriminal behavior crossing home and abroad has been revealed, voices are growing that about 60 countries including the United States should join the cybercrime prevention agreement.

Three speedy members surrendered to the police today (31st) while speeding up investigations into doctors' room users.

(Video coverage: Sang-Bo Jung, Video editing: Park Player)