HELP Social Study paper due on Dred Scott Decision info inside...?

Ok, here is the scenario. I have to turn in a paper on the Dred Scott Decision, but before we turn it in we have to do a debate brief on it....The proposition is: The Supreme Court's ruling in the Dred Scott decision is flawed, slaves who become free should have the rights of a citizen. I need help on what would be the affirmative side in this debate brief and what would be the negative side. Any help would be greatly appreciated.