criminal / culprit

certain, clear, without a doubt / secure, reliable, able to be trusted completely

if I remember correctly, in my memory, probably but not totally sure.

certain, definite

a man / a son

maybe, probably

brutal criminal, vicious criminal

man / son / baron

a male person / (specifically) a man, an adult male / 男, 漢: (specifically) a manly man / a male lover / a manservant / a husband / (obsolete) an unmarried young man / (colloquial) homosexuality

a surname