Will GSOC send my complaint back to the Garda Síochána?

Complaints involving criminal matters are dealt with by a GSOC officer.
If it's about a possible breach of Garda discipline, then it will likely be dealt with by a senior Garda officer on our behalf. Sometimes GSOC supervise these investigations.
If it's about a possible breach of Garda discipline, and it's deemed suitable, you may have the option of having the matter resolved through Local Intervention. If you agree to this your complaint will be sent to a Garda Inspector.