Do we need to get a lawyer if my 14 yr old daughter is having simple assault charges filed against her.

She was involved in an altercation with a 14 year old girl who sustained bruising on her face. The girl has been harassing/cyberbullying my daughter most recently over the last few months and steps to stop it, including going to the parent, reporting to social media and trying to file a police report have not stopped it. It is happening outside of school and she does not go to the same school as my daughter. The girl knew my daughter was going to be at a private house and no one knew she was going to come there. My daughter feels it was a setup to start problems. The police will not file a harassment report because in all of the girls online statements she does not use my daughters last name and the girl can just say she was talking about someone else. My daughter has never been in trouble before and the police told us that getting lawyer would probably not change the outcome. They feel the charge will probably be referred to a juvenile commit