Hallie Jackson NOW - Feb. 4 | NBC News NOW

WE ARE COMING ON THE AIR WITH NEW DETAILS ON THE INVESTIGATION INTO THE DISAPPEARANCE OF SAVANNAH GUTHRIE'S MOM. TWO SENIOR OFFICIALS SAY THEY'RE LOOKING INTO WHAT APPEARS TO BE BLOOD OUTSIDE HER HOME, AND WHEN HER PACEMAKER MAY HAVE BEEN DISCONNECTED FROM ITS MONITORING APP. NO SUSPECTS YET.BUT AS WE KEEP SAYING, TIME IS OF THE ESSENCE. IT IS SO IMPORTANT WE'RE GOING TO TAKE YOU LIVE TO ARIZONA, WHERE A COMMUNITY TONIGHT IS COMING TOGETHER. ALSO NEW TONIGHT, AN NBC NEWS EXCLUSIVE.OUR TOM LLAMAS GOING ONE O ...