Recommendations Apathetic MC

Does anyone know any manga with an apathetic, murderer, crazy, smart MC? Preferably male protagonist and no romance. I like the killings in Brutal: Satsujin kansatsukan No Kohuhaku and Funouhan (currently reading)
Also crime, mystery mangas like Detective Conan. Smart male MC and no romance again. Thank you.

 

That's Basically Warlork of the Magus World and The Legendary Mechanic

 

Reverend Insanity
(available as manga)

 

idk many but from the red fog is similar to what you mentioned

 

Reverend Insanity
Warlock of the Magus World
Carefree Path of Dreams
Kill The Hero (not evil but apathetic)
Way of the Devil (ruthless, gets a wife later on, good morality)
Paradise of Demonic Gods
These are the ones I like

 

oh wow thanks! (ㆁωㆁ)

 

You're welcome

 

1. Classroom of the Elite
2. The Boy Who Swore Revenge On The World
3. To Deprive a Deprived Person
4. Emperor of Solo Play
5. Ouroboros Record
6. Invisible Dragon
7. The World Online
8. Everyone Else is a Returnee
9. Renegade Immortal
10. The Lazy Swordmaster