Bribe, a reward promised or given to a person in order to corrupt his or her judgment or conduct. Bribery is the crime of offering, giving, or accepting a bribe. Public officials are sometimes bribed to grant favors or to permit the violation of law. Other persons who are sometimes offered bribes include voters, witnesses in courts, judges, jury members, labor union officials, employees, and athletes.
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.