”A kind and beautiful person”... Convenience store employee in his 20s dies in sudden stabbing incident in South Korea

A female convenience store employee in her 20s who was the victim of the "Siheung murder incident" that occurred on the 12th of last month in South Korea died the following day. Residents who regularly used the convenience store expressed their sadness.
On the 14th, a note, chrysanthemums, and sweets were placed next to the entrance of a convenience store. The note read, "Hello, I used to buy Strawberry Milk every day, but now I'm giving away jelly.
On the same day, according to Yonhap News, a resident commented about the deceased convenience store employee, "He was a very kind and caring person.
"He was a kind person who would leave water and food in front of the convenience store for stray cats," he said. "He's worked there since the convenience store opened three years ago, so many residents know him."
He added, "It is very sad that such a kind and beautiful person became the victim of this sudden incident." On the 12th of this month, at around 6:59 pm, Mr. A met with a man with whom he had no regular contact (3
5) was stabbed and seriously injured, and was taken to the hospital in a state of cardiac arrest, but died on the afternoon of the 13th. There were two customers in the convenience store at the time, but the incident took only four to five minutes.
B is alleged to have committed this crime at a convenience store approximately 200 meters away immediately after killing his brother-in-law, C, with a murder weapon at his home.
Police, who responded to a resident's report, responded to the scene at 7:55 p.m. on the same day, 1.8 kilometers from the convenience store.
B was arrested on the spot on the street about a mile away. B was arrested on the 14th, two days after the incident. In relation to the motive for the crime, B was diagnosed with a mental illness in April last year, was hospitalized and discharged.
B took the medicine for about a month, but then voluntarily stopped taking it. B started living with his mother, stepfather, and brother-in-law around this time, but after that, his condition worsened without treatment, the police said.
The investigation is speculating.