josh mankiewicz (voiceover): anna nausea, indigestion, and stomach pain. mosesi couldn't imagine it. who didn't love anna? >> reporter: anna moses has been found murdered. >> i couldn't imagine it. who didn't love anna! >> reporter: potential suspects included the men in her life, from the poet to the boyfriend who talked to police and then to himself. but police are about to make a dramatic discovery. when you find a letter in russian, you don't know whether that's going to be a great clue. >> right. >> reporter: or just a shopping list. spoiler alert, it's not a shopping list. who does it point to? >> we were pretty confident he was going to be our guy. >> reporter: as homicide investigators struggled to solve the murder of anna moses, their list of suspects grew longer. >> we have people of interest in -- during this -- and there was certainly a lot of them. >> reporter: anna's life proved full of men who seemed to deserve a second look. there was her son, igor, who stood to collect $750,000 in life insurance. her ex-husband husband, bob, divorced but still i