Family mourns ‘catastrophic loss’ of 4-year-old boy fatally mauled by pit bull in Detroit suburb

A vicious attack by a friend’s dog has shocked a community and turned into a nightmare for a Michigan family.

A pit bull killed a 4-year-old boy while his mother tried to stop the animal with a knife in a horrific scene Tuesday evening inside their home in Hazel Park, a city just north of Detroit,...