todd luckasevic, associate medical examer for allegheny county, performed the autopsy on autumn >> itas regarded as a sudden, unexpeed death >> reporter: which meant the county needed to figure out why this otherwi healthy woman was dead there was no reason to suspect fertility hormones, vitamins or supplements like creatine could have led to her collapse her brain showed no signs of a stroke though an examination of the heart did reveal an abnormally shaped heart valve >> it's a congenital anomaly found in approximately 2% of the population >> reporter: does it lead to early death? >> not in your 40s you need to be symptomatic >> reporter: at the conclusion of autumn klein's autopsy, the exdical examiner was perpled as to what killed this woman >> i'm not seeing anything i'm seeing a healthy white female, that for all intents and purposes, should be alive. >> reporter: on the form that fo askecause of death, dr. luckasevic wrote "pending," no definitive answer but in a few days' time he would have more information. the bloodwork was back from lee lab. autumn had suffered a very unnat