Jon and Patsy Ramsey, the parents of slain 6-year-old JonBenet Ramsey (whose 1996 murder has yet to be solved), have filed a $65 million libel and defamation lawsuit against former Boulder, Colo., police detective Steve Thomas, who accused the couple of having a role in their daughter’s death, reports the Associated Press. The 51-page document filed Thursday in Atlanta alleges that Thomas made false accusations about the couple in a book he co-authored and in TV interviews that promoted the tome, “JonBenet: Inside the Ramsey Murder Investigation.” Thomas did not return a call to AP seeking comment.