NEW : The report was written as a ` ` professional statement , '' a state official 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 . Prosecutors tried , unsuccessfully , to convince jurors that Anthony used chloroform to render her daughter unconscious and then duct-taped her mouth and nose to suffocate her . A Florida jury acquitted Casey Anthony on all charges .
NEW : The report was written as a ` ` professional statement , '' a state official 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 . A Florida jury acquitted Casey Anthony on all charges .