Help

Have you tried Killing/Stalking?

http://www.mangago.zone/read-manga/kindaichi_shounen_no_jikenbo/
not literally a protagonist where he keeps killing people but every case there's someone who kills and kindaichi has to figure out who it is

http://www.mangago.zone/read-manga/brutal_satsujin_kansatsukan_no_kokuhaku/
http://www.mangago.zone/read-manga/from_the_red_fog/
Last two aren’t exactly like that but they’re good too imo
http://www.mangago.zone/read-manga/an_uncomfortable_truth/?kzAd
http://www.mangago.zone/read-manga/yagiza_no_yuujin/

http://www.mangago.zone/home/mangalist/76405/

Killing Stalking... mmmm... I don't really like yaoi.

Check here you will see what you like Here

http://www.mangago.zone/home/mangalist/76405/

I did. Thank you.

Oh glad you did ヾ(☆▽☆)

Let me know if I can help again

The yaoi is minimal.