Cover up
After the shooting was done, someone (maybe
PR flack) realized that Seamus having committed the killing using the Sureshot prototype is a potential PR disaster. So while everyone else was running around, they quietly went down to
CEO's office, got one of his guns from the wall, and switched it in for the Sureshot, which he put back in the lab.
This was cleverly done, and he was careful not to get any prints on the planted gun. But the
CSI might notice, if they check, that the only prints
on the planted gun are from CEO -- there are none from Seamus, which is very strange. Seamus should have a few of the weird Sureshot bullets in his pocket, which don't at all match the gun -- they also look like tiny rockets, with a grid of holes at the bottom. Some of the witnesses should be clear that Seamus was carrying a rather high-tech looking gun. And some should have notes about seeing the culprit near the office and the lab after the shooting.
