This is just speculation, I have no indication whatsoever about this incident other that which has been already reported.
Assuming that the victim was indeed the intended target (that is, not simply tbeing at the wrong place at the wrong time), there are surely many other places where it would be easier to commit this murder. (Remember Peter Nielsen?)
As already said, this has happened inside a restricted area. I would speculate that the murderer does also have a valid ID for that area as well as access to the victim's schedule.
Sorry if I'm making an distasteful post, no disrespect meant, just pointing a possibility not previously mentioned.
In any case my condolences for those left behind.
