A 17-year-old boy is under arrest and accused of fatally shooting a 22-year-old man over the weekend in Duluth, marking the city's first homicide of the year. Police said the gunfire occurred about 7:10 p.m. Saturday downtown in the 100 block of E. 3rd Street. Authorities have yet to say what led the shooting, and they are asking for the public's help in their investigation. Anyone with .