maybe this ?
https://www.mangago.me/read-manga/a_thousand_cranes/
Suicide line
https://www.mangago.me/read-manga/nevermore_team_hitman/
https://www.mangago.me/read-manga/hell_high_water/
https://www.mangago.me/read-manga/park_hanhoo_s_manager/
https://www.mangago.me/read-manga/criminal_interview/
https://www.mangago.me/read-manga/max_mojave_s_case/
https://www.mangago.me/read-manga/daniel_s_extremely_private_villain/
Anyone know any yaoi that’s a mystery/
crime drama? Something dark with a romance subplot perhaps?