Location for both of them says unknown. The soccer boys haven't said anything about getting rid of them and when talking to them they sometimes ask why Sam keeps letting the bullies push her around. Mind you this was after Sam rejected their help to stop the bullying two times already.
If they did get killed by the boys without Sam's input that's honestly really cool, as it makes the world feel more dynamic. The boys heard Sam say that she doesn't want the bullies to pick on her other friends so that's why she is okay with being a target, but the boys came to the optimal solution, taking out those scumbags. Either way I'll do some more testing later and look to see if there are any hints or any place they might be.