Events of GTA Online
The Diamond Casino & Resort
At some point after The Diamond Casino & Resort opened, Yung leased one of the penthouses to live in and work on an album, along with his Doberman Pinscher. He hosted several wild parties, at which it is hinted that cocaine was available. By this time, he had become what he describes as a 'role model', doing product promotion in breakfast cereal commercials, and being the brand ambassador for a luxury sedan. His public image was such that he could be booked for appearances on children's shows, and so keeping his private life away from the public eye, and particularly the truth about his parties became very important to him.
However, at his most recent party, there was an "accident" which involved massive blood loss and resulted in someone's death. Yung apparently stashed the body initially in a room in the penthouse, at which his dog 'went crazy' scratching at the room's door. He still managed to keep the body from being discovered by the hotel staff, although housekeeping still had to deal with the blood; when questioned on it, Yung claimed that since there was no body found, no crime had taken place. Management would later request that Yung tone down his parties. After the Duggan Crime Family bought the Diamond from Cheng Family Holdings, they began reviewing Yung's lease.
At some point, Yung managed to relocate the body into the trunk of a rental car without being seen. His involvement with the death isn't clear, but he mentions that he didn't commit any murders that can be proven, and considered the incident serious enough to be sentenced from 15 years to life imprisonment.
The Diamond Casino Heist
The first time the player takes the elevator up to the roof terrace of the Diamond Casino after the update, a cutscene will play introducing Yung Ancestor. This is followed by a phone call from Lester. After receiving a phone call from Yung players will have the option to use him to help infiltrate the casino on the Big Con approach.
In order to get Yung to help, the player must first help him get rid of the evidence of his "accident" in a blue rental car with a black license plate, and then, later on, chase down and destroy all of the cameras that the paparazzi used to take photos of one of Yung's parties they had managed to infiltrate. Once that's pulled off, Yung will work with the crew during The Big Con approach. Here, he and Brucie Kibbutz meet up with the crew outside Ms. Agatha's office and convince Debbie to tell Thornton Duggan to meet them. Once she leaves however, Yung feigns panicking, saying Debbie knows what they're up to and blaming Brucie for it before pulling out a pistol and shoots Brucie in the leg. As Debbie walks out of Ms. Agatha's office and helps Brucie get to a doctor, Yung quickly leaves the scene and let the crew continue on their own from here.