car on craigslist. she met shahzad to sell him the car. she gave him his phone number so they could meet again to buy it. all cash, no paperwork. all in the parking lot of this shopping center. according to police, that call back number led to shahzad. the car's seller and friend there worked on the police artist sketch of the suspect. it was good police work and very sloppy criminal work. the would-be terrorist built an inept bomb. court records show he drove the bomb himself into new york, leaving behind keys to another car, a cell phone used to call a fireworks company, and so many other clues, he literally led detectives right to his door. and according to those same court records, shahzad admits to much of it. >> the mistakes made by this individual that led to the quick solution to this crime are phenomenal, in the sense of the mistakes all along the way. >> reporter: once identified, the idea was to watch him, listen, try to record phone