During a chat with DJ Vlad, Fredo Bang explained how he got attacked in prison by goons whom somebody from the outside paid to do him dirty.  [Jump to 4:30]

"They had a n*gga from across the hall claim that I got his people f*cked and he want to do something with me.  I didn't even know that n*gga.  It ain't even clicking in my head what's going on, but we can do something.  So that's how they tried to pull it."

According to Bang, someone then snuck him from behind and got him down, but he eventually fought his way out.

He believes his attackers were offered about $1000 to rough him up.  However, they didn't end up getting paid.

Bang said in prison you can get somebody to administer a beating for as little as $100.  One thousand bucks could probably get you a rape.  A murder would be two or 3K.