<p><br /> The man believed to be the owner of the dog which mauled to death a woman at her home has been arrested.<br /> </p><p><br /> Alex Blackburn-Smith had been urgently sought by police following the victim's death last night at a house on Demesne Road, Wallington, south London. She was named locally as Barbara Williams.<br /> </p><p><br /> The Belgian mastiff, described by one officer as large and ferocious, was shot dead by police marksmen.<br /> </p><p><br /> Tonight, a Metropolitan Police spokesman said: "A 34-year-old man has this evening attended a south London police station and has been arrested on suspicion of manslaughter and suspicion of cultivating cannabis."<br /> </p><p><br /> Sources confirmed that the arrested man was Blackburn-Smith.<br /> </p>
