Extenuating Circumstances, in law, facts that may be presented to a court to lighten the penalty placed on a person convicted of a crime. The previous good character of the convicted person is often presented as grounds for leniency. Other extenuating circumstances are youthfulness; mental deficiency or disease affecting a person's ability to know right and wrong; and unfavorable home and community environment.
What makes a person not only murder, but murder multiple people over days, weeks and even years? There's a special name for these types of murderers: serial killers.
With modern security, how can thieves walk out of a museum with millions of dollars worth of art? It usually just takes force and a little bravado.