A friend of Jamal Moghe has told the Sun newspaper that he believes the Metropolitan Police officer was singled out by bandits on a crowded bus in Kenya.
The newspaper quotes Mr Moghe's "best friend" Shil Abdiaziz, who was not on the trip, as saying: “We believe they found his Met Police ID card — it spooked them and that’s why he was the only one shot and killed."
The attack reportedly took place around 150 miles north of the capital Nairobi.
Mr Moghe had been on his way to undertake charitable work in his native Somalia where he intended to distribute used laptops, the Sun reports.
More top news
Liang Sheng-yueh's girlfriend, who was found by his side, died three days before they were discovered.
The Tonight programme investigates how Brits living throughout the EU are facing up to an uncertain future.
Boris Johnson said the Government may bypass a House of Commons vote to authorise military action against the Syrian regime.