Heather , 19 , and Sheila von , 21 , of Indonesia area confess , police say . They had been charged in the death of Mack 's mother , Mack Weise Sheila von . Motive was how mother `` was against Schaefer 's relationship with Heather , '' police say . Daughter was at the killing scene when her mother was killed , police say .
Heather Mack , 19 , and Tommy Schaefer , 21 , of Chicago area confess , police say . They had been charged in the death of Mack 's mother , Sheila von Weise Mack . Motive was how mother `` was against Schaefer 's relationship with Heather , '' police say . Daughter was at the killing scene when her mother was killed , police say .