Getting into college after being expelled?

[sharp336]

My best friend and I both would like to attend UCF next year for college. I think I have what it takes to get in and my friends grades are not that bad but do need to improve. Last year he was expelled from his high school after police officers searched his car, which was on campus, and found some marijuana crumbs. How do colleges look at being expelled, will they think of it as a past mistake and just focus on grades and test scores, or will they hold it against him and decrease his chances of getting in. by the way he was expelled in 10th grade and is now going into 12th grade. Thanks