homicidal

hɒmɪˈsʌɪd(ə)l

adjective

capable of or tending towards murder; murderous.

he had homicidal tendencies

murderous,violent,brutal,savage,ferocious,fierce,vicious,bloody,bloodthirsty,barbarous,barbaric,cruel,mortal,deadly,lethal,death-dealing,cut-throat,sanguinary,fell