Despite a reward of up to $1,000,000 and thousands of leads coming in, the best investigators can say is that the investigation is "definitely closer." The search includes combing for a key piece of missing evidence: the suspect's cell phone. Sheriff Chris Nanos says cell towers in the area have been pinging, among other leads, in an effort to connect a digital trail. He acknowledges that there is a lot more data, leads, and tips to be looked at. TIPLINE: FBI TIPLINE PH: 1-800-CALL-FBI (1-800-225-5324) ANONYMOUS TIPS: PH: (520) 882-7463 See omnystudio.com/listener for privacy information.