Crimes of omission is an offence that is categorized by<em> a person's failing to perform an act that is required or is seen as that person's legal duty. </em>
Some examples of crimes of omissions are child neglect, manslaughter by gross negligence and failure to disclosure terrorists acts.
Another example: a person who is aware of a dangerous situation such as a house on fire in progress, can face criminal charges for not notifying authorities.