G4S 'warned' over killer security guard Danny Fitzsimons
1 October 2012 Last updated at 13:50 BST
Security firm G4S was sent warnings not to employ an armed guard in Iraq just days before he murdered two colleagues, a BBC investigation has found.
Private security guard Paul McGuigan, from the Scottish Borders, was shot dead by Danny Fitzsimons in 2009 in Baghdad while on a protection contract.
Another man, Australian Darren Hoare, was also killed.
All were working for UK contractor G4S, which was operating under the name ArmorGroup in the region.
Samantha Poling reports.