frank rodriguez was dead. his family was stunned. he'd been a healthy man. >> my mother called me after angelina called her on the day that frank died, and mom just said she lost it. she started screaming and slammed the phone. it was horrifying. >> reporter: he was only 41. frank left behind a widow and a 9-year-old stepdaughter, to whom frank had become very close. >> how did your daughter react to frank dying? >> she was devastated, but she was also very confused. one confused. the coroner's office found no obvious cause of death. natural or unnatural. no heart attack, no trauma, nothing. toxicology test found a little vicodin in frank's list, but not enough to kill anyone. his family was at a loss, especially his wife angelina, who seemed to be groping for answers. trying to make sense of what happened to frank. >> she called me almost every day to talk about it. she thought she was killed and she thought he was poisoned. >> reporter: the idea seemed, on the face of it, crazy. who would want to kill frank? >> i just didn't know wh