on the 15th. >> reporter: the day and time at which ken dolezsar was shot to death. ller? if so, they now had his voice because earlier that caller left this phone message. >> hey, ken, this is robert. i talked to dave. he said when you get to -- >> reporter: detectives traced the cell and went to the store where someone bought it. >> this phone was purchased with cash with no identifying information provided to the carrier. >> reporter: but the family did have a suggestion for the detectives, something they actually agreed on. he should look carefully at a man named david novak. yes, that david novak. remember novak's consulting business for prison-pound executives? guess what? >> dee mower was incarcerated in federal prison. >> reporter: tax fraud. ken's wealthy wife dee was novak's client. that's why ken dolezsar knew ken novak. and something made ken's relatives suspicious. so detectives drove over to the loft where they spoke with mr. novak. >> he was soft spoken. >> reporter: and a bright man. >> he came across as very intelligent, yes. >> reporter: answered all