BTK announces his arrival by murdering four members of the same family; he claims more victims over several years while taunting police, then goes dark for two decades before resurfacing in 2004 after media stories claim that he'd been forgotten.
Dennis Rader, aka BTK, confesses to 10 murders and points police to the disturbing hoard of evidence against him; the depth of his depravity is revealed, along with the lasting effect he had on those in his orbit, especially his own daughter.