A US federal judge who was disciplined after an investigation found that she had sex with a police officer in her chambers and then lied about it wrote a letter to a former law clerk apologising for her “harmful, offensive, and unprofessional behaviour”.An investigation initiated last year by the chief judge of the 11th Judicial Circuit found that US District Judge Eleanor Ross had sex in the courthouse with a high-ranking uniformed police officer within earshot of staff, attended a partisan...