A 17-year-old boy has been charged as an adult with first-degree murder in the killing of a man and a seven-month-old baby last weekend in south Minneapolis. Prosecutors say Jquan McInnis shot into a car at a man he had a dispute with. Gustav Christianson was struck multiple times and died at the scene. The infant, Jayden Redden, was hit in the chest and died later. McInnis told detectives he didn’t know the baby was in the car.