Husband in his 80s with dementia and wife in his 70s died after falling from the 12th floor of an apartment together = South Korea

An elderly couple died after falling from an apartment in Yongin, Gyeonggi-do, South Korea. According to the police on the 25th, at around 7:40 p.m.
Mr. A, a man in his 80s, and Mr. B, a woman in her 70s, fell. A passerby who was passing by at the time called 911. Mr. B died at the scene, and Mr. A was taken to a nearby hospital for treatment in a state of cardiac arrest.
The digit died. After examining security cameras, the police confirmed that the couple, who live on the 7th floor of the apartment building, took the elevator to the 12th floor and fell.
Police believe that he committed suicide based on the notes left in Mr. A's pocket and at his home. In a memo, Mr. A wrote that he was having a hard time with his chronic illness, and that he lived separately.
It is said that he left a message asking for his son's contact information and a death certificate. Mr. A had suffered from dementia for some time, but was recently diagnosed with severe dementia, and his wife, Mr. B, also suffered from joint pain.
It is said that she has been caring for her husband in a physically handicapped state. As a recipient of basic living security, they are eligible for housing allowances that receive support for housing rent, etc.
I found out that I participated in the job opening business. Police are investigating the details of the couple's family and acquaintances.