Gus makes a pretty good point here:

It’s been only 48 hours and the FBI already released a major crime scene in a case potentially involving international terrorist groups.

— Gus ¯\_(ツ)_/¯ (@Gus_802) December 4, 2015

Allowing anyone access to the scene this soon after has the potential to disturb evidence that could come into play later (as if co-conspirators were later discovered domestically or abroad). It could ruin potential prosecutions too.

And for what? To see the banality of evil?