dayna herroz: i was engulfed in heat. and i know when i went back to the phone, the line was dead. kiewicz: dayna called police to find out more. they confirmed the news that both her daughter and grandson were dead. they held back the details because it was a gruesome crime, but soon enough, dayna would hear it on the news. tori had been beaten. both she and 10-month-old baby dean had been strangled. dean was still in his crib. i called the sergeant and said, "please, tell me that this isn't true." he said, "i can't tell you that." and then, the nightmare began. josh mankiewicz: by the time dayna had learned what had happened to her baby grandson and her daughter, police had already gone through the apartment dusting for prints, searching for dna, looking for anything that might explain this double murder. first of all, what could you tell from the crime scene? just that it appeared to be a violent assault. josh mankiewicz: lieutenant kevin rooney supervises the san diego police homicide unit. there was no forced entry into the apartment, but it wasn't uncommon for tori and her two

dayna herroz: she wasn't perfect,