Can you say Waterboy???? Man taken to hospital after shooting self in knee February 5, 2009 A Salem man was taken to the hospital this afternoon after he shot himself in the knee with a pistol, officials said. Matthew Maceira, 29, was cleaning the 40 caliber semi-automatic handgun in his home in the 4200 block of Nina Ave SE at about 2:30 p.m., Salem police Cpl. Larrey Owens said. Maceira had not removed the weapon’s magazine, and the gun fired and hit his left knee, Owens said. Police think the shooting was accidental. Maceira was wearing a brace on his knee at the time of the shooting, Owens said. His two children, who arrived home from school soon after the incident, remain in the care of family while Maceira is being treated at Salem Hospital. No one else was injured.