John Leslie Grieves
- Died:
- 14 August 2010
- Age:
- 46
- Rank:
- Constable
- Force:
- Police Service of Northern Ireland
- Cause:
- Road Traffic Collision (RTC)
- Duty Status:
- Travelling From
Police Memorial Tribute
Died when his motorcycle was in collision with a car in Portglenone, County Antrim, while travelling home after finishing his duty at a major public order event.