Identify whether or not a crime has been committed in each of these cases. In each case, explain fully why this is, or is not, a crime.

• Ken, a 6 year old boy, was pretending to be a cowboy while playing with his father's pistol. He loaded the pistol as he had seen his father do in the past. He then took the pistol and shot his brother.
• Jeremy, while in the boys' washroom at school, set fire to a roll of hand towel. As a consequence of his actions serious fire and smoke damage occurred in the school.
• One evening while coming home from a friend's home, Joyce was stopped by a police officer for driving her moped without lights and reflectors.
• One evening while home alone, Heather heard a noise downstairs in her kitchen. Nervous, she grabbed her husband's revolver from the bedside table. While terribly frightened, she made her way down the darkened stairs. Seeing a shadow, she fired the gun in its general direction. Unknowingly, she killed her husband who returned home two days earlier than expected from a business trip out of town.
• While walking across someone's lawn, a post officer fell down a large hole that had been dug because of a blocked sewage pipe. The hole was uncovered, and not indicated by a warning sign. The post officer had always walked the same route while delivering mail to his customer for years