DENPASAR, Indonesia -- In 2014, 18-year-old American tourist Heather Mack did the unthinkable.
On a family holiday to the tropical resort island of Bali, Mack convinced her then-boyfriend Tommy Schaefer to murder her mother -- Chicago socialite Sheila von Wiese Mack, the wealthy widow of a Chicago composer -- by bludgeoning her to death with a heavy fruit bowl.
