Hi I once watched a Japanese detective show  but now cant recall its name and for some reason cant find any clue regarding it on the internet. The detective show had a very Sherlock esque character. The first case was regarding a serial killer who would kill and leave a code based note. One of the so called victims a lady actually killed herself in order to hide that her younger brother was the actual serial killer. The detective himself was after very critical cases and the line he would say when he almost fixed the case was "satsujin wa utsukushii janai".
Sorry for any inconvenience caused would really appreciate the help.
Thank you 
Rinsho Hanzai Gakusha Himura Hideo no Suiri
Thank you so so much. Really appreciate your help.