, i have yelled at shirlene.rlene. >> there it was in his own hand. >> mm-hm. >> evidence she left for you to find. >> yes. >> suddenly, the sisters truly believed their mom was sending secret clues that almost screamed "open in case of death." determined to solve the mystery, they found a willing ally in the detective. one plan they came up with, secretly recording a phone call with ken. tammy made the phone call from the police department. the strategy was for tammy to act friendly, supportive. >> hello. >> ken? >> tammy. >> he told her he was deeply concerned for shirlene. >> i miss her very much. >> but ken also said he was suspicious of tammy and her sister. >> the feeling i'm getting, i feel like you are going to plan on ganging up on my. and it sounds like you're going to sue my for man slaughter or something or murder. >> but still, he spoke with tammy at length about the day. he said shirlene told him she took pills and seemed suicidal. >> she said she wanted to die? >> she did say something like it's no