NEW YORK (AP) —Rapper Kid Cudiis set to testify Thursday at the New York sex trafficking trial ofSean "Diddy" Combs. He follows a former aide to the music mogul who told the jury about the threatening world he said Combs created for his inner circle. Prosecutors allege that Combs, a three-time Grammy winner,used his fame and fortuneto create a deviant empire of exploitation,coercing womeninto abusive sex parties while silencing victims through blackmail and violence, including kidnapping, arson and beatings. Combs' lawyers argue that all the sexual acts were consensual, and although he could be violent, he never veered into sex trafficking and racketeering. Kid Cudiis expected to testifyabout his brief relationship 14 years ago with Combs' ex-girlfriend, the R&B singerCassie. She spent four emotional days on the witness stand responding to questions about the most disturbing secrets of her sex life, and describing being beaten and raped by a man she once loved. The Latest: Ex-assistant described cleaning up booze, drugs and baby oil after sex marathons Combs' one-time personal assistant testified Wednesday that he was in charge of cleaning up hotel rooms after the hip-hop mogul's sex marathons — tossing out empty alcohol bottles, baby oil and drugs, tidying pillows and making it look as if nothing had happened. Kaplan, who worked for Combs from 2013 to 2015, said the Bad Boy Records founder would sometimes summon him to a hotel room to deliver a "medicine kit," a bag full of prescription pills and over-the-counter pain medications. He said Combs dispatched him to buy drugs including MDMA, also known as ecstasy. Kaplan, 34, was granted immunity to testify after initially telling the Manhattan court that he would invoke his Fifth Amendment right against self-incrimination. Prosecutors contend Combs leaned on employees and used his music and fashion empire to facilitate and cover up his behavior, sometimes making threats to keep them in line and his misconduct hush-hush. ▶ Read moreabout Kaplan's Wednesday testimony Manhattan courthouses are familiar territory for some rappers Rapper and actor Kid Cudi will be following in the footsteps of plenty of other rappers who have had reason to visit the two Manhattan federal courthouses over the past two decades. They've appeared as witnesses, participants in civil lawsuits, and in some cases, criminal defendants. Among those who came to these courts before him was Tekashi 6ix9ine, Ricky "Slick Rick" Walters, DMX, the Beastie Boys, N.O.R.E. or Noreaga and Lil' Kim. What is Kid Cudi's involvement with Combs and Cassie? Last week, Cassie testified that Combs arranged for her to meet Cudi in 2011 to work on music. The two began dating soon after, and she said she got a burner phone to communicate with Cudi in secret. Cassie said she and Combs had broken up at the time, although they still engaged in sex parties that Combs orchestrated. It was during one of these that Combs looked at her phone and learned of the Cudi relationship, Cassie testified. In response,she said he lunged at herwith a corkscrew and kicked her in the back. When Cassie and Combs were out of the country in 2012, Combs told her that Cudi's car would be blown up and Combs wanted Cudi's friends there to see it, Cassie testified. On Tuesday,Cassie's mother, Regina Ventura, testified that Cassie told her Combs was so angry about her relationship with Cudi that he planned to release sexually explicit videos of her and send someone to hurt Cassie and Cudi. Who is Kid Cudi? The Cleveland born-and-raised, skinny-jean wearing, Grammy Award-winning rapper has long been celebrated for his alternative hip-hop, emotional music that effortlessly weaves genres together in surprising ways. Cudi began assomething of aprotégé ofKanye West,when the then-uncontroversial rapper signed Cudi to his G.O.O.D. Music label in 2008. Cudi left in 2013. He is featured on Jay-Z's "The Blueprint 3" and West's landmark "808s & Heartbreak." Cudi has always had an eye and ear toward innovation. In 2022, his album "Entergalactic" was released alongside a Netflix adult-animated romantic comedy of the same name, which hetold The Associated Pressallowed him to "explore the abstract." Kid Cudi expected to take the stand Cudi's turn on the witness stand will come immediately after George Kaplan, a former personal assistant to Combs, finishes his testimony. A prosecutor said testimony by Cudi, whose legal name is Scott Mescudi, was not expected to be lengthy. Cassietestified last week that Combs threatened to blow up Cudi's car and hurt him after he learned she was dating the rapper and actor. Cudi is to follow Kaplan to the witness stand after the personal assistant to Combs from 2013 to 2015 finishes telling about what he experienced during 80- to 100-hour work weeks. ▶ Read moreabout Cudi's upcoming testimony