Oklahoma authorities are working to recover more “trophies” that BTK serial killer Dennis Rader said he hid in multiple locations, the Osage County sheriff announced Tuesday. The sheriff’s office has been poring through “very, very good tips” from the public regarding possible additional victims following CNN’s exclusive reporting on Rader’s detailed colored drawings of barns with female victims, which were recovered by law enforcement after his arrest in 2005. CNN Sans ™ & © 2016 Cable News Network