Cops shooting at Frank?
In the Egyptian museum, when Frank starts to get away, the 2 cops don't hesitate firing their guns on him repeatedly, and they continue in the street, where there were many other people fleeing from the museum.
This seemed really odd, as Frank was hardly a suspect at that time, and they didn't have any evidence against him, just the fact that he was apparently in the toilet at the restaurant when the guy had a heart attack (plus the fact that he met Ray few hours before his death), which only made him a potential key witness. Had they killed him, they would have potentially killed an innocent man, and they would have never known the truth (plus the murders would have kept happening, but they couldn't know that).
This doesn't seem to have been discussed here, am I the only one bothered by this?