A juvenile suspect has been arrested and faces multiple charges after he allegedly struck and killed an 18-year-old student in a March hit-and-run. According to a spokesperson in suburban Dolton, the charges have been filed in the March 30 death of 18-year-old Lania Smith, who was struck and killed by a speeding driver near the intersection of East Sibley Boulevard and Martin Luther King Drive. “This remains an active investigation, and we conti…