The last of the murders in the Whitechapel file was committed on Friday 13 February 1891 when prostitute Frances Coles was murdered under a railway arch. Her body was found by PC Ernest Thompson only moments after the attack at 2:15 am at Swallow Gardens, a passageway under a railway arch between Chamber Street and Royal Mint Street, Whitechapel. Minor wounds on the back of her head suggest that she was thrown violently to the ground before her throat was cut at least twice, from left to right and then back again. Otherwise there were no mutilations to the body. Superintendent Arnold and Inspector Reid arrived soon afterwards from the nearby Leman Street police station, and Chief Inspectors Donald Swanson and Henry Moore, who had been involved in the previous murder investigations, arrived by 5 am. A man named James Sadler, who had been seen with Coles earlier, was arrested by the police and charged with her murder. A high-profile investigation by Swanson and Moore into Sadler's past history and his whereabouts at the time of the previous Whitechapel murders indicates that the police may have suspected him to be the Ripper. However, Sadler was released on 3 March for lack of evidence.