A suspect in a catastrophic clinic fire in Japan has died in hospital.

Police said Friday that the suspect in a fire in Japan that killed 25 people died at a hospital where he was being treated for burns and smoke inhalation.

Morio Tanimoto was being investigated for arson and murder in the fire at a mental health clinic in Osaka, western Japan, on Dec. 17. He passed away on Thursday.

On security camera footage, Tanimoto, a clinic patient, may be seen. He had purchased a significant quantity of gasoline, and the incident was compared to a 2019 arson assault in Kyoto that killed 36 people.

Tanimoto had been in a coma, according to Japan’s widely distributed Yomiuri newspaper, and his death will likely leave much of the crime unsolved.

According to Japanese media accounts, Tanimoto, a retired metal worker, had strained relationships with his family.

The Osaka fire destroyed an eight-story structure, trapping people inside, however firefighters were able to extinguish the inferno within an hour.

There was just one route out, and the elevator and emergency stairs were outside the clinic, raising severe concerns about the building’s design’s safety. Patients and the senior doctor were among those slain.

Shinji Aoba, the suspect in the 2019 arson at the animation studio, has been charged and will stand trial.

The incident elicited an outpouring of compassion from both within and outside of Japan, as well as donations for the victims and the studio’s reconstruction. It had obliterated much of the legendary studio’s animation material.

Both fires stunned Japan, which has a low crime rate. Japanese society’s inherent conformist inclinations can occasionally lead to discriminatory attitudes toward mental health.