Sub-Inspector Thomas Hartley Montgomery (c. 1842 – 26 August 1873, Omagh, Ireland) was a senior official of the Royal Irish Constabulary.

[2] On 29 June 1871, Sub-Inspector Montgomery, who was chronically short of funds, assaulted William Glass, a clerk employed by the Northern Bank, with a hedge knife and stabbed him through the head with a filing spike.

However, Montgomery's subordinates ultimately learned of his financial difficulties and eyewitnesses identified him as having left the bank one hour before the body of William Glass was discovered.

As a result, a County Tyrone coroner's inquest brought a verdict of willful murder against Sub-Inspector Montgomery.

[4][3] His last words were "May Lord have mercy on my soul"[citation needed] This Irish biographical article is a stub.