Quoted:


Yup, could all be innocent childhood jackass activity, but it could also be the beginning of a sociopath.  My youngest who is a few years older that the OP's had a boy in her class that liked her.  She was not interested but was nice to him until he started treating all her other friends like shit as he felt he wanted her all to himself.  She then decided they would no longer talk which set his ass off.  He spread lies, worked to turn others against her, faked injury from my daughter which got her in trouble the first few times until some class mates stood up for her.  Talked with the teacher and we found out she was constantly having trouble with the kid and knew he was the issue but her hands were tied by the admin.  Kid apparently was adopted out of a home and became the sweet little snowflake that was allowed to act wrong due to his situation.  Kid even went so far as to find out where my daughter went after school for gymnastics so he could join and stalked her there.  He caused problems with the friends she had established at gymnastics by spreading bullshit about my daughter at that place too.  And this was not isolated to her.  My boy's scout troop has leaders come around from other troops and we heard that this boy caused quite a few boys to leave the troop he joined due to the lies, subversion, etc.  This kid will end up a stalker.  In the end, it got so bad that we took my daughter out of the school and home schooled her.  Kid has no idea where she went.

So in OP's situation I would investigate and talk to the school.