'Guilty' in the Bible

Then they said one to another, We are indeed guilty concerning our brother, whose anguish of soul we saw when he besought us, and we did not hearken; therefore this distress is come upon us.

I will be surety for him: of my hand shalt thou require him; if I bring him not to thee, and set him before thy face, then shall I be guilty toward thee for ever.

For thy servant became surety for the lad to my father, saying, If I bring him not to thee, then I shall be guilty toward my father all my days.