Numb3rs Fanfic Finders

Now I'm not sure if this is just a one shot or a scene in a bigger story but I remember this scene quite clearly and can't seem to find the story it was from.

All I remember was some guys were trying to kidnap Charlie from CalSci, they had a gun on him and Don was acting like he didn't know who Charlie was when bumping into them. I remember the guys get shot at and one of them falls on top of Don which causes Don to fall on top of Charlie. I don't remember if either Don or Charlie was hit but this is all I can remember from the story. Any help in finding it would be greatly appreciated.