Search for Nancy Guthrie enters fourth day

We're now hearing the 911 dispatch audio from the day Nancy Guthrie was reported missing. >> A white female 84 years of age, 5C medium build, high blood pressure, pacemaker, and cardiac issues. >> On day four of the search, senior officials briefed on the investigation tell NBC News that investigators are looking into what appears to be blood found outside NY's home.They also say her pacemaker appears to have disconnected from its monitoring app in the early hours of Sunday morning. Today, the sheriff's dep ...