In flagrante delicto is a Latin term that means in the act of committing a crime. If you're looking for a synonym for this phrase, you can use the words caught in the act, caught red-handed, or caught in the crosshairs. Other expressions that can substitute in flagrante delicto include being caught in the act of doing something wrong, being caught in the midst of a transgression or being caught committing an offence. Regardless of the synonym you use, all of these words convey the same sense of wrongdoing and capture the essence of the original phrase in flagrante delicto.