She looks a lot like my reptile keeping cousin Julie. Glad it's not her though!
Black eyes are usually swelled and generally have a yellowish outline around the bruised area. The eye itself is also often red and/or closed. Today as they led her from the courthouse to the car she didn't have any black eye at all.
In the movies and forensic medical footage, when someone gets a symbol or word carved into them it's pretty vicious, there's blood coagulation and gaping wounds. On a cheek I think the fatty tissues should be bursting out from a shape like the well rounded portions of the B cut into the cheek. It mentions a "dull knife" but even a butter knife would break the skin if used with uncaring brute force. It looks to me like that backwards B could have been done without even breaking the skin using something like the back end of a pen on your cheek scratching and repeating the pattern until it made the design.
http://en.wikipedia.org/wiki/Willie_Horton