he crawls to the back and hides in a storeroom. the clerk gets the police on the line and hands mang the phone. did they leave? i don t know, i don t know. reporter: following the murder of officer sean collier, the tsarnaev brothers hijacked the suv. tamerlan pointed a gun at mang and said, you know the boston marathon explosion, i did it and i just killed a policeman in cambridge. he said they placed homemade explosives in the suv s trunk and drove to a bank where dzhokhar used mang s atm car to withdraw $800 in cash. tamerlan tsarnaev made small talk and ask him about himself. he said, i m chinese.
tamerlan said, i m chinese. taking his time picking out chips, that s when mang decided to run. surveillance video shows tamerlan to tell his brother mang has escaped. he leaves the snacks and follows tamerlan. mang alerted police that his vehicle has gps tracking. deb feyerick joins me live now. deb, what was the reaction of not only tsarnaev but the jurors when they saw those videos? reporter: well, the jurors were particularly riveted by some of the videos shown in relation to sean collier because they did see pictures of his autopsy photographs and how he was shot. so that was very moving. we saw a couple of the jurors appear to tear up on that. but when they saw this kind of video, it was so interesting because the testify of mang was so quiet, so understated and yet