30 August 2011 Last updated at 14:57 ET

Sleaford sex meeting 'led to boy murdering David Cowley'

David Cowley's body was found at the quarry near Mareham Lane in November

A teenage boy has appeared in court charged with murdering a man after arranging to take part in a sexual act.

David Cowley, 67, was found dead off Mareham Lane in Sleaford, Lincolnshire, in November 2010.

At Lincoln Crown Court the 17-year-old, who cannot be named for legal reasons, denied murder, but admitted manslaughter, said the prosecution.

A second 17-year-old has admitted handling stolen goods but has denied perverting the course of justice.

'Punched and kicked'

The court heard the defendant met Mr Cowley, of Broadfield Lane in Boston, at Sleaford railway station and was then driven by him to a remote spot at Ballast Pits off Mareham Lane.

Amjad Malik QC, prosecuting, told the jury that the victim was an openly gay man who had offered cash and mobile phone top-ups to the 17-year-old in exchange for a sexual liaison.

He said Mr Cowley was dragged from his car and punched and kicked by the boy, who had planned to rob him of his vehicle and other possessions before killing him.

"He brought David Cowley face down compressing his neck, probably in an arm lock from behind," Mr Malik said.

"When he was compressing Mr Cowley's neck he blocked his airway. David Cowley was asphyxiated within a very short period of time."

The prosecutor said there was no evidence to suggest that Mr Cowley had managed to defend himself during the attack.

The trial continues.