I believe it even more after looking at long shutter pics of helos with their spotlights on. You still see all the other lights on the heli, they're not blown out like some suggested. Also, we should see the surface of the lake illuminated by the spotlight. We do see a slight glow that's more consistent with a rocket higher up.
Additionally, the medivac company did not provide any specific details about the flight path. Many times aircraft don't actually fly exactly direct routes to their destination.
It would be helpful if we could get a copy of any additional photos taken from the time lapse as well as any security or webcams that may have been in the area.
We should also look into how the missile might have been stopped. There could still be pieces of it in a lake somewhere.