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“Exercise to restore the procurement list” Acquisition case of Mr. and Mrs. Kawai What is “digital forensics”?
In the trial of the acquisition case by former Justice Minister Katsuyuki Kawai and his wife, Senator Sakuri, local lawmakers who received money appear every day to give vivid testimony. How did the prosecution determine the objective of the acquisition?
Mr. Kuri, wife of former Justice Minister Katsuyuki Kawai, who was arrested and charged in the acquisition case by the House of Representatives election last year. At Mr. Kuri’s trial, local lawmakers who allegedly received the money appeared in court and stated that “I thought it was money that I couldn’t show” and “I received a back-to-back call from Mr. Kuri.” I am.
“I thought it was illegal” (Shinji Kosaka, former mayor of Aki Ota)
Mayor Aki Ota, who had previously appeared as a witness on the 23rd, admitted that he had received 200,000 yen in cash from Katsuyuki and said, “I received money that I should not have received.”
According to the prosecution’s initial statement, Katsuyuki created a detailed “procurement list”, such as the names of the local councilors who gave the money and the amount of money, and entered them on the computer. However, this list was removed from my computer. So how did the prosecution get a complete picture of the acquisition? It is believed that “certain technology” was used.
“In this company, digital forensic work is being carried out at the request of an investigative agency,” (reporter).
Although not involved in the case of Mr. and Mrs. Kawai, the company provides “digital forensic” technology, such as restoration and analysis of deleted data at the request of the Prosecutor’s Office and the police to cooperate in the investigation.
“I would like to delete the sample data.”
Completely delete the sample data prepared in advance and have the restore job replayed.
“This means that it is not in a state that can be confirmed by the general public.”
Carefully remove the hard drive from which the data was erased and connect it to a dedicated analyzer.
“It has been restored” (reporter)
Data was restored in less than a minute.
“Simple deletion leaves the data firmly, and the investigative agency uses a dedicated tool to restore and analyze it.” (AOS Data Toshiyuki Ose)
In addition, it is said that there is important information that is obtained by analyzing the GPS function of the mobile phone.
“Smartphones capture GPS information and record latitude and longitude information over time. You can see when and where the owner was” (AOS Data Toshiyuki Ose)
Digital forensics has played an important role in shedding light on the case. There are more than 100 local legislators and officials allegedly acquired by Mr. and Mrs. Kawai, and witness questioning will continue in the future.
