Busan police officer shoots again... 2nd incident in a month - South Korea

A police officer working at a police station in Busan, South Korea, was shot and killed. On the 21st, the Busan Metropolitan Police Agency announced that a police officer, Mr. A, was shot and killed in the break room of a police station in Busan at around 12:15 pm on the same day.
A was found shot to death. A had undergone surgery for a herniated disc in October last year and had been on and off sick leave repeatedly since.
Police said that this was Mr. A's first time arriving to work since taking sick leave on the 12th of this month. On that day, Mr. A said he was "not feeling well" and rested in the break room without having lunch. When he returned after lunch, a colleague, a police officer,
When the inspector checked the break room, he found Mr. A collapsed. A police official said, "It is presumed that he took his own life," and added, "The exact cause of death is under investigation."
A similar incident occurred at a police station in Busan on December 25 last year. At the time, the deceased police officer, Mr. B, shot himself with a gun while his colleague was responding to a call.
However, no suicide note was found. ■Main consultation services listed on the Ministry of Health, Labor and Welfare website to prevent suicide
Mental health consultation hotline: 0570-064-556
●Yorisoi Hotline: 0120-279-338, From Iwate, Miyagi, and Fukushima prefectures: 0120-279-226
● Lifeline: 0570-783-556