reporter: hey there, brooke. this is a suspected murder mystery that has rocked pittsburgh involving two star doctors. a husband and a wife. and after a three-month investigation police allege the doctor murdered his wife, dr. autumn klein, a lethal dose of cyanide. he s sitting in the jail behind me facing criminal charges he denies. new details in the suspected murder mystery. for the first time we re hearing how the doctor allegedly prepared his wife creatine regimen. he prepared five crams of creatine in the morning to take in the morning or evening by mixing it into a sugary drink or putting it on her toast. she was so kind, compassionate. reporter: debbie remembers her 41-year-old doctor. the head of women s yurology at