Robert Beattie, an American, Wichita-based, lawyer, is the author of the non-fiction book Nightmare in Wichita.
Rader resumed sending letters to media again after a 13-year hiatus after hearing about the book.
Beattie is also known for interviewing serial killer Charles Manson for a class project as a professor at Newman University in Wichita, which stirred controversy and brought media attention to him.
Beattie ran unsuccessfully for the office of Kansas Secretary of State in 2006.
[3] He testified in front of the Kansas legislature against the reliability of polygraph examinations.