The Cause of Death
The blows to Jayna’s head were countless. There were stab wounds to her shoulder, one to her lower back, and two to the back of her head. The blood on the rope, along with ligature marks around her neck, indicated that she was strangled.
Source: NBC
But it was a knife stabbed into Jayna’s neck that ultimately caused her death. After that kind of injury, you have less than a minute to live. The blood trail in the store also proved that Jayna was desperately trying to escape.