I'm starting the think that Kelvin Inman shot Radzinsky. The reason I think that is just the amount of time we have seen Radzinsky this season. He just doesn't seem the type that could sit still and push a button for 3 years. Ok I can see Locke, Inman, Desmond, Eko, and even Hurley but Radzinsky in a hatch for 3 years having to push the button ever 108 min. I don't think so. Of course this also explains the Map on the Blast door. Having to do something to keep himself from going more crazy. So back to my Theory I think after 3 years Kelvin Inman probably had enough of Radzinsky temper and wacko personality and shot Radzinsky himself.
