FILE PICTURE – Police at the scene of a fatal stabbing of a 22-year-old man in Derby City Centre. See NTI story NTISTAB; Police in Derby have confirmed a murder investigation has been launched after a man died following a stabbing in Derby city centre last night. Officers said they were called to St Peter’s Street at 8.30pm to reports that a man had been attacked. They have now confirmed a 22-year-old man, taken to the Royal Derby Hospital, later died and that a murder probe had been launched.