(BEIJING) — Escalating efforts to repatriate one of the ruling Communist Party’s most wanted exiles, Chinese police have opened an investigation on a new allegation, rape, against New York-based billionaire Guo Wengui, who has been releasing what he calls official secrets ahead of a pivotal party leadership conference. Two Chinese officials with direct knowledge of the investigation told The Associated Press that police are requesting a second Interpol arrest notice for Guo, 50, for the alleged sexual assault of a 28-year-old former personal assistant. Guo and his representatives did not respond to repeated requests for comment. The rape allegation represents a new element in the sprawling case that Chinese prosecutors are building against the real estate tycoon, who is being investigated for at least 19 major criminal cases.