In other news of the Ramseys, Kris Kristofferson has signed up to play a detective in an upcoming CBS miniseries about the JonBenet case. Along with Kristofferson, the miniseries will star Marg Helgenberger ("China Beach") and Ronny Cox ("Beverly Hills Cop") as JonBenet's parents, the network announced. Six-year-old Dyanne Iandoli will play the 6-year-old beauty queen victim. Production on "Perfect Murder, Perfect Town," based on the book of the same name by journalist Lawrence Schiller, began production last week. The air date has yet to be announced.