"Rudy links arms with me, inviting me to take a walk with him, he has something important to tell me," he said, adding that Guede was worried because "I don't know whether to tell the truth or not, and that the truth is altogether different from what you hear on TV."
According to Alessi, Guede said he and a friend went to the house Miss Kercher shared with Knox with the intent of having sex with Miss Kercher and that when she refused, the scene turned violent.
Mario Alessi said he believed Knox and Sollecito were not at the house at the time of the murder
He said Guede told him he had gone to the bathroom and upon coming back he had seen his friend holding Miss Kercher to the ground.
Eventually, "a knife appeared, almost out of nowhere," Alessi said, quoting Guede as saying that it was pointed at Miss Kercher's throat.
Alessi claimed that as she was fighting, her throat was slit. Guede tried to help her, but his friend stopped him, saying "we've got to finish her, otherwise we'll rot in jail".
Guede did not reveal the identity of his alleged accomplice, according to the witness.
Alessi said he and Guede had become friends but eventually he broke it off as he realized that Guede had said two innocent people were in jail and had done nothing about it.
Alessi said he then contacted lawyers representing Sollecito.
At the court's request Guede is to be heard as a witness on 27 June.http://www.bbc.co.uk/news/world-europe-13823473