would be two guards. >> rick was one of the night watchman on duty the night of the crime. until now, he had never done a television interview about what happened that night. rick was 23 years old back in 1990. he had been working at the museum for about a year. the guard's shift began at 11:30 p.m. a shift that most nighting was uneventful. >> boring. sit around, walk around basically. one guy would go up and start his round. and then when he came back, he would get behind the desk and the other person would go up. >> on this night, things would be far from boring. during the night shift, there's always one guard manning the computer at the security desk by the side door, the employee entrance, which is the only way into the museum at night. that door was locked. so anyone who wanted to get into