Can someone please help me? Where can I find the results of an autopsy for my mother?

My mother ped away on October 26, 2007. My family is telling me that she ped away due to a mive heart attack. One day I heard my aunt telling my father that she couldn't believe my mother did that before she ped. My mother had a drug problem and she had been in and out of the hospital for the last four years for different problems such as cellulytis, AIDS, bronchitis, eumonia and so on. I was just wondering if anyone out there knows where I can find her autopsy so I can really know what happened. I am tired of asking my family and they tell me she had a mive heart attack. I know that isn't true.