welcome back. matth matthew muller, the harvard he had -- educated man, what he told us was disturbing. here with the conclusion of "twisted tale" is josh makowitz. mountain view, california, the heart of silicon valley, the headquarters of google. and in september 2009, the scene of a strange and terrifying crime. >> i was asleep in bed, and the next thing i knew, there was someone laying on top of me. their hand was over my mouth. >> the woman we're calling samantha hadn't heard the names denise huskins or matthew miller