Fakebook messenger ratted her out, she hasn't specifically claimed responsibility, but she's been talking about it and was clearly happy when the goatfucker was found dead.

This is generally not enough evidence. So far no information from telecom companies who would have been able to track their phones, if they brought them. This happened around February to April which is at least 5 months ago. Telecom companies only store logs for 1 month then it's deleted.