reporter: what began with fire became murder and manhunt. the level of intensity in this investigation is incredible. reporter: a best friend turned worst enemy. this gentleman was a friend of ours for a long time has taken everything. reporter: hundreds in desperate pursuit of one teen in grave danger. the amber alert was on. i see a picture of this blonde-haired girl. i said that s the girl we ve seen up on the mountain. reporter: kidnapped, the rescue of hanna anderson. it was going to be a normal summer weekend, pop warner football for ethan. cheering practice for hannah. a road trip for the dog and mom christina to jim s house.
incredible. a best friend turned enemy. a gentleman who was a friend of ours for a long time has taken everything. reporter: hundreds in desperate pursuit of one teen in grave danger. the amber alert was on and i see a picture of this blonde haired girl. i said, that s the girl we seen up on the mountain. reporter: kidnapped. the rescue of hannah anderson. it was going to be a normal summer weekend for the andersons. pop warner football for 8-year-old ethan. cheerleading practice for 16-year-old hannah. a road trip with the dog and mom christina to jim dimaggio s house. he had been asking the andersons to visit for sometime. we re getting together for some type of family gathering. bill gore is san diego county sheriff. jim led people to believe he was going to be losing his house