The Basement: A Vanishing In Apple Valley S01 E01 Episode 1

Three members of the same family and a family friend all disappear without trace. Their home is found to be laden with pools of blood. For three days, police and the local community search for them. Then a Walmart bag left in the house leads police to the home of 30-year-old tree surgeon Matthew Hoffman, where they discover one of the most bizarre and horrifying crime scenes in recent American history.