Journalist Jane McSorley recounts her four-year investigation into a man arrested in Glasgow who claimed to be Irish orphan Arthur Knight but was identified by US authorities as fugitive Nicholas Rossi. The episode details the bizarre courtroom scene where the defendant, appearing frail and disrespectful, vehemently denied being Rossi while battling severe COVID-19. McSorley shares her initial shock and the complex journey of uncovering the truth behind this case of alleged mistaken identity.