I am curious as to how to go about researching an old case in Oklahoma. I am a historical researcher, but have never really handled a cold case. What steps would I have to go through to obtain the police files on this case which is from the mid-1980's. This case is from Seminole, OK. and may be related to the Denise Haraway case that is the subject of "The Dreams of Ada" by Robert Mayer and frequently mentioned in "The Innocent Man" by John Grisham. The case I am researching is the Patty Hamilton case. I think that if this case can be solved, the it may help prove that Tommy Ward and Karl Fontenot were wrongfully convicted in the Denise Haraway case. Any advice would be greatly appreciated.