A 12 yr. old girl pinched a boy on the bottom at school. The resource officer asked the boy if he wanted to press charges and he said no. The boy's mother found out and insisted the girl be arrested for battery. Do you feel the mother went to far? The school had already suspended the girl. 

Being that I'm not sure about the whole story I couldn't say. Was the boy harassed (mentally, physically, sexually) by this girl before? Had she touched him before?  Is this girl a problem? Had she been warned previously, but because he's a boy no one took him seriously? Just because he was asked doesn't mean he would want to look like a wuss and complain about a girl touching him.

How would I feel if the genders were different? Would I be more tolerant of this mother doing this if it was a girl complaining about a boy?

On one hand it seems a bit much, but I just don't know enough to make an informed opinion on it.

I'm pretty sure I had my butt grabbed by a girl around that age as well. I didn't care at all. I would have been far more distressed if my mom had wanted to make a big deal out of it than by it actually happened. It sounds like the mother has gone too far here (especially in ignoring the boy's wish that the issue not be taken further). At the same time, it's understandable when parents react like that.

Oh my....really? When I was in school, pinching someone's derrier was a sign someone liked you. Let kids be kids....I think micromanaging is getting waaaay outta hand.