. >> then detective judy stanley got a call from her counterpart in lincoln, nebraska, 200 miles away. lincoln police had just arrested a man named mars davis on a drug possession charge, and davis offered them a deal. he said he was willing to provide information about an unsolved murder in des moines in return for leniency on his drug charge. >> i felt tremendously guilty for a long time. i didn't want to think about it anymore. it bothered me every time i closed my eyes. >> unfortunately, davis didn't know the name of the victim. he did, however, remember the neighborhood where he lived. >> he only knows that he lives at a house someplace off of harding road. he knows it's by a convenience store. he knows there's a couple car washes nearby, knows the guy works for a tv station, knows that he went to the outer limits and knows that he's killed in his house. >> mars davis was describing pat mcrae's murder, and the details he provided were so bizarre, it was hard for investigators to believe. >> it's not a story that you expect to hear every day in the news. >> mars davis said that fi