Andrew Mountbatten-Windsor, the former Prince Andrew and younger brother of King Charles III, has asked London's High Court to quash the warrants used to search his properties after his arrest in February on suspicion of misconduct in public office; a hearing is due Thursday, partly behind closed doors. Police are investigating whether he passed confidential government documents to the late sex offender Jeffrey Epstein while serving as the UK's special trade representative from 2001 to 2011; he was released the same day, has not been charged and denies wrongdoing. Legal experts say that even a successful technical challenge might not halt the wider investigation, which has deepened the royal family's crisis.