Corrected entry: The scenes at the Louvre are implausible, to say the least. A man is shot inside the museum and goes about painting on the basement and leaving clues and then dies without the security staff noticing it at all. The same happens again when Langdon and Sophie, once they've become fugitives and are searched for, walk around and talk at ease, apparently without the video cameras detecting them. The Louvre Museum is probably one of the best surveilled buildings in the Europe.
SexyIrishLeprechaun
21st May 2006
Correction: The wing that the curator is in is completely blocked off and no security staff were present at the time. The procedure in a situation such as that is for the security staff to call the police. By the time they arrived, Saunier was already dead. Furthermore, the surveillance cameras in the Louvre do not work as the Louvre is simply too massive for it to be cost-effective to constantly monitor all the cameras. Instead, the gates fall around anyone who takes a painting off a wall (as demonstrated by Saunier) and they are trapped inside.
SexyIrishLeprechaun