. >> reporter: the victim is aurora barrera, an assistant manager for the bank and an l.a. native.sed, surveillance cameras inside and out show barrera carefully following the kidnapper's instructions. enlisting the help of the only other employee in the bank as she empties the vault and tosses two bags with a half million dollars out the side door. at the very moment aurora is dropping the bags out this bank door, a getaway car is pulling up on this side street. the robbers have timed this perfectly. we know that, because one of the robbers spoke exclusively with "20/20." >> it was, like, one of those moments where you have no control over your body. you're just in shock. there was just, like, money everywhere. >> reporter: brian perez has been recruited into the heist by his friend richard menchacca, who drove the first getaway car. perez says the money is now transferred to his car to keep police off their trail. the handoff takes place at this car wash right around the corner from the bank. >> so he opened my door and he pretty much threw all the money in the back of the car. >