The Brief Authorities released the names of the shooter and the six of the eight victims murdered on Oct. 9 at an Erie, Pennsylvania home. Two of the victims in the shooting were a 5-year-old boy and 1-year-old girl. Police said several of the victims and the shooter, identified as Matthew Stone Sr., were related, and another victim was a friend of one of the other victims. Investigators are working to determine a motive in the shooting, but Erie Police Chief Rick Lorah hinted that Stone's mental health was a possible factor, according to The Associated Press. The names of the shooter and six of the eight people shot and killed at a home in Erie, Pennsylvania, including seven of his relatives last week have been released. Matthew Stone Sr, 45, was identified as the shooter in the Oct. 9 deadly attack, according to Erie County coroner Lyell Cook. Erie Police Chief Rick Lorah told The Associated Press that Stone took his own life. Shooting victims identified What we know: The victims in the deadly shooting were Michelle Stone, 44; Angelina Stone, 24, who was due to give birth Monday; Jonathan Stone, 19; Matthew Stone, 21, and two women who lived at other addresses: Lora Roberts, 37, and Twila Tanner, 51, The Associated Press reported, citing Erie County coroner Lyell Cook. What we don't know: Cook added that a 5-year-old boy and a 1-year-old girl also died, but that state law prevented him from releasing their names. The AP reported that at a memorial to the victims, Julius Windham told the news outlet that his daughter Amarianna was the toddler who was killed. The child's mother was Angelina Stone, who was also the mother of the boy who died, he said, sharing that the shooter was a grandfather and the family patriarch. Family friend Nicole Eller said Roberts routinely went to the home to help during the pregnancy of her niece and neighbor, Angela Stone. According to the AP, Roberts, identified by friends as a mother of five who was engaged to be married, was a v #fox4news #crimewatchdallas