Season 2 of Mindhunter introduces fans to a shocking new killer. 1 / 8
This comes in the form of Agent Bill Tench's introverted son, Brian. 2 / 8
His family finds out Brian watched two boys murder a toddler. 3 / 8
Brian insisted they then place the baby on a cross to resurrect it. 4 / 8
The boy isn't charged but Bill and his wife, Nancy, struggle to cope thereafter. 5 / 8
Agent Tench keeps questioning Brian on whether he's mentally stable. 6 / 8
Later, Nancy finds Brian staring creepily at a girl, confirming he's more than he says. 7 / 8
The season ends with Nancy moving away with Brian, leaving Bill with his job. 8 / 8