Who is Robert Mueller? Ex-FBI boss diagnosed with Parkinson's disease; led Russia investigation into Trump's 2016 campaign

Robert Mueller, the former FBI director and special counsel for the Russia investigation, was diagnosed with Parkinson's disease in 2021. His family confirmed the diagnosis, stating it led to his retirement from public life in 2022. Health concerns, including speech and mobility issues, prompted the withdrawal of a subpoena related to the Jeffrey Epstein probe.