There's a lot of trust on the internal systems, once you have clearance, to be able to access these docs. In this case, however, he might have been involved in

There's a lot of trust on the internal systems, once you have clearance, to be able to access these docs. In this case, however, he might have been involved in creating some of these (or some kind of rollup product) and would therefore probably have access to different material to help support that creation. Or its a Snowden situation and he has access because he has privileges on the system due to being a sys admin of some sort.