Synopsis

The UCOS team's inquiry into the murder of 55-year-old interpreter Agnes Bradley yielded a partial DNA match from a teenage boy who years ago had thrown a brick onto a motorway as a reckless challenge. They brought the boy in for questioning, hoping to determine if a male relative might be responsible, but uncovered a disturbing truth: his mother had been raped, suggesting they could be pursuing a rapist who had escalated to murder. Agnes Bradley was an avid chess player, prompting Gerry Standin