Kid Cudi took the stand in the federal sex trafficking case against Sean “Diddy” Combs, offering emotional testimony about his past relationship with singer Cassie and the alleged intimidation he faced from the music mogul.

The acclaimed artist, born Scott Mescudi, told the court that Diddy became enraged after discovering that he was dating Cassie, who had reportedly told Cudi that her relationship with Diddy had ended.

At one point, fearing for their safety, Cudi said he and Cassie checked into a hotel in West Hollywood to avoid a confrontational Diddy. While at the hotel, he received a call from Diddy’s assistant, Capricorn Clark, informing him that Diddy was inside his house. Alarmed, Cudi said he immediately called Diddy and asked, “What are you doing in my home?” Diddy allegedly responded, “I want to talk to you.”

When Cudi returned home, he found no sign of Diddy — but noticed that Christmas presents meant for his family had been unwrapped and his dog had been locked in the bathroom. Disturbed by the intrusion, he called the police. According to Cudi, his dog sitter called to inform him that his Porsche 911 convertible had been set on fire while parked in his driveway. Jurors were shown photographs of the aftermath, including a hole cut in the car’s fabric roof and a Molotov cocktail discovered on the passenger seat.