13/12/2011 12:39 GMT | Updated 13/12/2011 12:57 GMT

Stephen Lawrence Murder Trial: Suspect Dobson 'Disgusted' By Own Racist Language

One of the men accused of murdering Stephen Lawrence has denied any involvement in the teenager's death and insisted he was at home at the time of the killing.

Gary Dobson also told a jury at the Old Bailey he was "disgusted" by racist language that he had used in a police surveillance video.

The obscenity-laden video, filmed at Dobson's flat in 1994, was earlier shown to the jury. It shows Dobson and co-accused David Norris launching racist tirades in which they fantasised about killing black and Asian strangers, continually use racist language and Dobson also reveals he threatened a black colleague with a knife.

As he was giving evidence, Timothy Roberts QC asked Dobson: "Did you have anything to do with the events that led to the death of Stephen Lawrence?," and Dobson replied: "No, I did not."

He claimed that he was at home all evening on April 22 1993, apart from going to visit his friends Neil and Jamie Acourt at about 11.45pm to borrow a Bob Marley CD and smoke a joint.

Key forensic evidence was found on a Supertramp jacket belonging to Dobson, but he said he had not worn it for three years before Mr Lawrence was murdered. He said: "I wore it to school once or twice and had the complete mick taken out of me." Dobson also claimed that another key exhibit, a cardigan, belonged to his father.

He said that he heard about the murder that night when another boy visited the Acourts' house, but that they did not talk much about it afterwards. "I would imagine we would have mentioned something about it but I don't think there was much conversation about it at all," he told the jury.

When police made house-to-house inquiries, Dobson said he did not think it was necessary to tell them he had gone out after the time of the murder. He said: "It was quite a bit nerve-wracking, it was the first time I'd ever been spoken to by a police officer."

Later in police interviews he also repeatedly denied knowing co-defendant David Norris. He said: "The only reason I can give you for that, I stupidly thought people's names I mentioned would be getting visits from the police. I stupidly denied knowing him."

Speaking about the surveillance video, Dobson said he was "disgusted" and "embarrassed" by the language he had used. "There's not really much I can defend or justify," he added, and he claimed he had made up the story about threatening a colleague because he was "being young and stupid". Dobson, 36, and Norris, 35, deny taking part in the gang attack in which Mr Lawrence was killed in Eltham, south-east London, in 1993.