Hugs to you and your grandson. I am so sorry that happened to him.
However, I AM glad that the school stepped in and did something.
This is my daughter's (who is also 14) first year in high school and she was practically RAPED by a senior who cornered her in the green room in her drama class....the school didn't do anything except "talk" to him. They wouldn't even remove him from the class....oh wait, they FINALLY did AFTER he did the same thing to two other girls.
I swear to you I am THIS close to just saying screw it and homeschooling them from now on. Schools are just too crazy these days.