NEW : The report was released as a `` professional courtesy , '' a state spokeswoman says . An autopsy performed in December 2008 by the local medical examiner determined `` that the exact cause of death can not be determined with certainty . '' The sheriff 's office wo n't take action based on the report , a sheriff 's spokesman says . The girl 's mother `` is the caregiver responsible '' for her death , the report finds . TL;DR A Texas teen died after being left in an overheated car while she waited to be picked up from school.
NEW : The report was released as a `` professional courtesy , '' a state spokeswoman says . The sheriff 's office wo n't take action based on the report , a sheriff 's spokesman says . The girl 's mother `` is the caregiver responsible '' for her death , the report finds . TL;DR A Texas teen died after being left in an overheated car while she waited to be picked up from school.