Nancy Guthrie case update: What does the blood spatter found outside reveal about the case?

Blood evidence at Nancy Guthrie's home offers clues to her final moments. Retired FBI agent Jim Clemente believes spatter patterns indicate she was close to the ground, possibly on her knees or lying down. The blood spots suggest she coughed up blood. Further patterns imply she was carried away. Nancy Guthrie, 84, has been missing since February 1.