The Fennelly commission, formally the Commission of Investigation (Certain Matters relative to An Garda Síochána and other persons), was a commission of investigation established in April 2014 by the then government of Ireland to investigate several controversies involving the Garda Síochána. The sole member of the commission was Nial Fennelly, a retired justice of the Supreme Court. Fennelly identified three separate strands within the commission's terms of reference: