My sister's lexus was "keyed" causing major damage exceeding $5,000. she did not file a police report.?

her younger sister caused the damage intnetionally. the police were called out but my sister would have been arrested and her two small children would have been taken away by social services. obviously no one wanted that to happen. how may my sister collect monetary damages to have her car restored? my sister (the automobile owner cannot afford an attorney). please help!