A man whose body was dismembered and put inside a suitcase had raped and blackmailed a teenage boy, a court has heard . The shocking evidence was given by a witness speaking under the pseudonym James Smith, at the murder trial of Yostin Mosquera at the Old Bailey. Mosquera, 35, is accused of murdering Albert Alfonso, 62, and Paul Longworth, 71, in July 2024. The couple's remains were discovered in a suitcase and trunk abandoned near the Clifton Suspension Bridge in Bristol. Mosquera denies both charges of murder, but has admitted to the manslaughter of Mr Alfonso. Appearing by video link, Mr Smith said he met Mr Alfonso at a rugby match almost 20 years ago, when he was around 17 or 18, the Mirror reports . He had had drinks in his flat afterwards, and remembered drinking heavily before waking up with a "banging headache". He continued: “I said to him, ‘What’s happened?’ – he showed me a video of me on all fours and he was penetrating me,” he told the court. “I didn’t know what to do. I was mortified. At this point I didn’t know my sexuality – I was confused and scared. (Being a) black boy in London, gay, whether you were drunk or not – it didn’t matter.” He said Mr Alfonso told him, “Don’t worry, I’m not going to show anyone,” but later added if he did “favours”, the footage would never be shared. During cross-examination , defence barrister Tom Little KC asked: “Does it cross your mind, looking back, that you were raped?” “Now, yes,” Mr Smith replied. “And does it cross your mind that your drink may have been spiked ?,” the barrister asked. Mr Smith replied: “Now, yes”. Mr Smith was then asked: “Does it cross your mind that you were groomed by Albert Alfonso?” He replied again: “Now, yes." He claimed Mr Alfonso told him he had an interest in "black dominatrix" fantasies and described fetishes involving "master-slave" dynamics. The court heard that the pair then started meeting frequently , with Mr Alfonso allegedly giving him around £150 for each sexual encounter. The meetings became routine and involved consensual sex acts including domination. The witness told the court they both wore masks during the acts, and that he would occasionally make contact when he needed money. During the pandemic , he said he became closer to him, and also started spending time with Mr Longworth. He claimed he would go on bike rides with the pair, and was sometimes supported financially. He told jurors he was later introduced to Mosquera, who Mr Alfonso described as a young Colombian man who was staying with them while studying at college. Mr Alfonso claimed he was paying Mosquera's travel and college fees , and Mosquera told Mr Smith he had a wife and child in Colombia, and was "just doing it for the money". Mr Smith said: “I asked if he was gay or straight – he said he was just doing it for the money . I said, ‘Great – so was I’.” He added the three had taken part in a sex session together just the week prior to the killings. When asked about the relationship between Mosquera and Mr Alfonso, the witness said: “Good – very good. He was going to London with him, sightseeing, he seemed fun. I didn’t see anything that seemed like they disliked each other.” Describing Mr Longworth, he said: “He wouldn’t hurt a fly. After the sessions he would come and sit with us and talk with us.” He described the final time he saw the couple , on a Friday night before their bodies were found. He added: “Albert gave me a hug, Paul gave me a hug, and that was the last I heard of those two.” The trial continues.