Im trying to find a manhwa

okay so guys pls help me, im so dumb, i finished a manhwa without knowing the title, help me find it, Its about a police, crime the guys name was Kang Hyunseok and Taehoon
and in every chapter it says Case Of Chronicles but when i search that it wasnt that so pls help me, ill describe it more, They were finding a serial killer and turns out killer was Hyunseok. If u know this pls reply (=・ω・=)