>> two missing girls, one man, and the secret. >> did you get any sense of this sort of personality we're dealing with? >> psychotic. >> he came up, and he went here, right to the edge. >> two families, two mysteries, two journeys for justice. >> if the lesson can be learned from amber, then i want to get out there. ♪ ♪ ♪ >> on the evening of february 12 2009, in a hillside house north of san diego california. the negotiation was finally complete. the girl had one. >> i made or write a one page letter to me, she made it two pages but repeater self multiple times to make it longer. as like okay. >> she pestered her mother perry, and her mother's