"The Sons of Sam: A Descent into Darkness" is a new documentary series produced by the online service Netflix. The show is based on the case of the infamous criminal named David Berkowitz, who was nicknamed Son of Sam. This serial killer was known for his particular ruthlessness: he would typically shoot random people he encountered on the streets. There was no political, racial, or gender motive behind his murders. Son of Sam attacked anyone indiscriminately. For a long time, journalist Mori Terry followed Berkowitz's crimes. Over time, he became obsessed with this investigation. Terry was convinced that Son of Sam was somehow connected to members of a satanic cult.