A British oil executive shot dead outside a restaurant was the victim of a 'nervous criminal who experienced a violent rage', detectives believe. Nicolas Mockford, 59, died instantly after being shot four times in Brussels. Police are working on the ehteory that he was the victim of a failed robbery rather than being targeted by hitmen. Mr Mockford's wife Mary was beaten badly around the face as she tried to stop two men taking her handbag and the keys to the couple's £40,000 Lexus 4x4 car. Nicholas Mockford, pictured centre, was cradled by his wife as he lay dying after he was shot three times as he walked to his Lexus SUV
@highlight
Nicholas Mockford, 60, was shot dead on October 14 but Belgian police imposed a news blackout
@highlight
Family fear he was target of 'professional hit' because neither his silver Lexus 4x4 or wife's handbag were taken
@highlight
Gunmen shot him four times, including once while on the ground
@highlight
Eco-terrorists assassinated him because of ExxonMobil's involvement  in Nigeria, Chad and Indonesia, claim bloggers
@highlight
Victim's wife says killers demanded he hand over his car keys before shooting him
@highlight
Detectives believe 'nervous criminal' got into 'a rage' before shooting
The headquarters of ExxonMobil in @placeholder, where the successful executive worked before he was attacked