Is it just me, or were there no security cameras on board any of the ships? Or if there were, it didn't seem to me that they were ever really used during, for instance, investigations and such.
I can't really think of a specific instance, but I definitely remember thinking to myself on multiple occasions, "why don't you just check the damn security footage??!!"
Someone correct me if I'm off base here.
Edit: I think I remember a specific instance now -- a Voyager episode where Maquis crew members were being killed off one by one, and one of these murders occurred in the holodeck in a "retro" movie theater. Tuvok ended up being the killer, but I distinctly remember them going through all this trouble to recreate the killer's likeness using all this technobabble nonsense, and I'm wondering why it had to be that difficult.