Disagree with Top Tier. Have your friend talk to his teacher and guidance counselor. They have been known to be merciful for one slip. He can ask them what he needs to do re his application. And if they say they are not going to bring it up, he shouldn’t either. This is one of those cases where, if mercy is shown, you take it and promise yourself never ever to be in this position again. (And remember that some day, someone else may need some grace.)