'Guilty' in the Bible

"What have you done to us?" Abimelech asked. "Any minute now, one of the people could have had sex with your wife and you would have caused all of us to be guilty."

And they said one to another, We are verily guilty concerning our brother, in that we saw the anguish of his soul, when he besought us, and we would not hear; therefore is this distress come upon us.

I will be responsible for him. You can hold me personally accountable! If I do not bring him back to you and set him before you, I will be guilty before you forever.

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.