It's your turn to be a good guy and a bad guy
Kamiya is the bad guy. However, it was also because he was discovered to have been bribed by Sanae and Masashi Yukimoto, kamiya was threatened by them to help deal with the murder case, and he could not properly investigate the case of the apartment. Kamiya is not a good person, but he is not involved in the murder of the apartment, and he has done a lot of things when threatened by Masashi Yukimoto, such as disposing of the body and not investigating the case.
It's your turn to how Kamiya died
Kamiya is killed by the murderer in episode 15, and when Masashi Kamiya is caught and confesses kamiya's bribes and asks kamiya to help, Kamiya is suspended from his job, and then called out by phone, Kamiya is attacked by the murderer at this time, and finally Kamiya's body is placed on a park chair, and his hands and feet are nailed. Kamiya died a very tragic death. Finally, Shota found Kamiya's body.
In episode 15, Kamiya knows who the murderer is, but he is still in no hurry to tell others the identity of the murderer, and the murderer kills him first. Kamiya has not investigated the case of the apartment only because he was threatened by Masashi Yukimoto, but because of the suspension, Kamiya can investigate the case, and finally finds out the identity of the murderer.
It's your turn to be a Japanese drama, and Kamiya is a supporting role in the drama, but because he has been threatened by the people in the apartment, there are many scenes on the scene. And Kamiya as a policeman, IQ and skills are very good, but did not expect Kamiya to fall single or was killed.