It is bad to murder others.
Tom's grandfather is very weathly and has recently added Tom to his will.
Tom wants to be rich.
Tom asks his wealthy grandfather for business advice and a modest start up investment while at a family dinner party.
Tom poisons his wealthy grandfather at a dinner party in order to inherit his share of his grandfather's fortune.
Tom's business is reasonably successful, and he earns a steady income over the next several years.
Tom's act is discovered by the police and convicted of murder, causing him to go to jail for the rest of his life.