Heather Mack , 19 , and Heather Schaefer , 21 , of Chicago , confess , police say . They had been charged in the murder of Mack 's mother , Susan von The couple initially told police they had been taken captive at the resort by an armed gang , whose members killed Sheila Mack , but they escaped , CNN affiliate Trans TV reported . Weise Mack . Motive was how mother ` ` was against Schaefer 's relationship with Mack , '' police say . Daughter was at the killing scene when her mother was killed , police say .
Heather Mack , 19 , and Heather Schaefer , 21 , of Chicago , confess , police say . They had been charged in the murder of Mack 's mother , Susan von Weise Mack . Motive was how mother ` ` was against Schaefer 's relationship with Mack , '' police say . Daughter was at the killing scene when her mother was killed , police say .