CCTV shows stabbed man begging for help

Mark Corcoran, 26, staggered into a convenience store in South Norwood, south London, after being attacked in the street on Valentine's Day.

He collapsed and died from a single stab wound, despite the efforts of paramedics, hours after attending a friend's wedding.

Det Chief Insp Cliff Lyons, who is leading the inquiry, said he urgently wants to identify others who were in the shop at the time.

Labourer Mr Corcoran, of Croydon, walked into the Subitha Food and Wine shop, in Whitehorse Lane, on Sunday at about 8.20pm. Investigators are trying to retrace his last movements on the street outside the shop to find the knifeman.

They released two CCTV images. The first shows a blonde woman in her 20s at the counter 44 seconds before Mr Corcoran entered the shop.

The second shows Mr Corcoran, in a stripy sweatshirt, seconds before he collapsed on the shop floor. Police want to trace other customers in the image.

A man in his 40s arrested on Tuesday has been released on bail until the middle of next month. Mr Lyons said: "We would really like to hear from the people in these CCTV stills or from anyone who may know how we can contact them.

"They are not suspects in this investigation but they may hold valuable information.

"Mark was probably stabbed within 100 yards from the shop and, due to the nature of his injury, collapsed shortly after he asked for help."