New Delhi, July 11 -- LONDON - The 26-year-old man detained on suspicion of murdering Ann Widdecombe walked free from a Devon and Cornwall Police facility on Saturday without charge, leaving Britain's most prominent political killing of the year without a named suspect and investigators working from a widened timeline that extended the mystery around the former Conservative MP's death.

Police confirmed Saturday morning that the man, a white British national from Newton Abbot, had been released. Officers offered no explanation and provided no indication of when the next arrest might come. Devon and Cornwall Police said the investigation remains active, that no broader public safety threat exists, and that the killing bore no terrorism con...