There doesn't seem to signs of struggle, so we can rule out the brute force having being used for now.

[which, however, doesn't remove the possibility of the coercion altogether. there are many ways to make one commit a suicide, and they both know it.

the red eyes are more focused on the man in front of him, carefully studying his body language. The gentle and almost somber manner he's treating the corpse is so alien, complete opposite of what he's used to see from him. But then again, this Clown is an enigma and as far as he's concerned this could all be just another act.]

She is my mother. [One would think that such confession would bring out more emotion from him, but no. Akechi is just as distant and analytical as before.]

And the murder weapon? It should be somewhere there unless the culprit hid it.