The movie is about two young siblings (Boy and Girl) running away from a person with a gun apparently I believe that the girl has some top secret information stored in here head, also I'm pretty sure through the whole movie its snowy outside, but definitely at the end of the movie the someone who hired the boy with the gun to kill/capture the girl was shot by that man that hired him, the man was old with white hair from what I can remember and the two siblings I believe had both black hair, and the boy that was after them with the gun had I believe some kind of spiky hard kind of slick

The boy with the gun that was shot I believe died on top of the roof while it was snowing

Details I'm not sure about
- I think that their parents were killed by the boy with the gun
- the two siblings looked around 10 and the shooter around 15


Please any help would be appreciated!

I think this movie was from around the 2000-2008 definitely

I have been looking for this movie for more than a week now please any one know it :(