A former newspaper editor has claimed journalist Martin O’Hagan’s killers have never been brought to justice because they were “paid police informants”.

The claim from ex Sunday World northern editor Jim Campbell, who worked with investigative reporter O’Hagan at the paper, comes on the fifteenth anniversary of the 51-year-old’s death.

O’Hagan was shot dead on 28 September 2001 in Lurgan, County Armagh, Northern Ireland, as he walked home from a night out with his wife.