Nina, Why?

So, I saw a trend of most of the commandos having some misunderstood past where they were mistakenly incarcerated in Belle Reve. But I gotta ask. Why the hell was Nina there? Aside from her unique appearance and inability to breathe air, she never committed any actual crime. The closest thing to a criminal act that she did was running away from home. And maybe fishing without a license. So how the heck did she wind up locked away with the rest of the squad? If anything, the cop that shot her father belonged there more than her. He was the real monster in that scene.