Uhm. Well I'm gonna play devil's advocate here, because well I want too and because I don't like people who provoke others and when other take notice play some victim (even if they weren't breaking any rules). That being said we know this kid already got suspended multiple times due to dress code violations (hats and whatnot). So while I don't know exactly how this school works, because I don't have the handbook outlining punishments and rules, but if he has multiple offenses the school may be more likely to suspend him faster and for longer if he broke dress code again (if this is a multiple violation I'm surprised he only got 3 days). In addition, we don't know what type of dress it is. Although my school did have uniforms for the majority of the time, there were quite a few days were uniforms weren't mandatory, but a new dress code applied stating what you could and couldn't wear. It prohibited things like really short shorts or skirts, tube tops, muscle shirts (wife beaters), etc. So if this kid wore a spaghetti strap short dress, yes wearing dress may have not been prohibited, but wearing short garments and spaghetti straps may have been, which the dress would than have violated.
Also, I'm not buying the mother and son's story. Having been a 15 year old boy, I find that story kind of ridiculous. More likely he did it as a bet between friends or to provoke a teacher and now his mother is just covering for him.
Also, I'm not buying the mother and son's story. Having been a 15 year old boy, I find that story kind of ridiculous. More likely he did it as a bet between friends or to provoke a teacher and now his mother is just covering for him.