Heriberto Pagan , 86 , shot his grandson and killed his grandson 's girlfriend , police say . The shooting may have been triggered by housing dispute , a law enforcement source says . In the vicinity , police were alerted to another shooting victim , Pagan 's 47-year-old grandson , who was critically injured with a gunshot wound to the head and found outside the Staten Island house where he lived with his mother and girlfriend . Score: 6
Heriberto Pagan , 86 , shot his grandson and killed his grandson 's girlfriend , police say . The shooting may have been triggered by housing dispute , a law enforcement source says . Score: 6