Sir David Harrel GCB GBE KCVO PC was an Irish police officer and civil servant.
Harrel was born in Mount Pleasant, County Down, the son of a land agent. He was educated at the Royal Naval School, Gosport, but was too old to join the Royal Navy as a Midshipman when he took the exam and instead joined the Merchant Navy. In 1859, he left to join the Royal Irish Constabulary. In 1879 he became a resident magistrate in County Mayo and in 1883 was appointed Chief Commissioner of the Dublin Metropolitan Police. Although himself a Protestant, he had good relations with the Roman Catholic Church and was a member of several bodies which worked to relieve the poverty of the Irish peasantry.
Source: Wikipedia