The BBC defended on Wednesday its handling of a DJ sacked years after he was the subject of a police investigation into allegations of sexual offences against a teenage boy.The controversy surrounding former radio host Scott Mills, 53, is the latest involving a high-profile presenter to roil the publicly funded broadcaster.London’s Metropolitan Police said this week that it questioned Mills in 2018 over allegations of “serious sexual offences” against a boy under the age of 16.The case was...