A 911 call that brought two police officers to a home where they were ambushed , and where a third was also later killed durning a four hour seige , was precipitated by a fight between the gunman and his mother , over a dog urinating in the house .
The Saturday agrument between Margeret and Richard Poplawski , escalated to the point that she kicked him out and she called the police to do it , according to a 12 page criminal complaint and affidavit filed late Saturday.
