The victim is 56-year-old grandmother Pamela Kreimeyer, who was hit in the head by a piece of shrapnel that flew 45 feet, killing her instantly. The debris continued another 144 yards through the air after hitting the victim.
Police confirmed the family was experimenting with different types of explosive material on Friday and Saturday. Instead of shooting the powder out of the device, its stand exploded and sent debris flying.
More here, including a diagram of pipe bomb that killed her, HERE