The big news of the day, of course, was the firefight between law enforcement officials and a man presumed to be Christopher J. Dorner in Big Bear, resulting in the shootings of two police officers, one fatally. Lost in the furor were a number of multiple-casualty shootings of the sort that seem to take place every day. I guess that's why they're not big news anymore - multiple shootings have become a dog-bites-man story. Here's our daily report: A University of Maryland graduate student shot two housemates, one fatally, then turned the gun on himself early Tuesday. Dayvon M. Green, 23, an engineering student who once interned at N.A.S.A., used a recently-acquired handgun in the shootings, and was also armed with an Uzi submachine gun, a machete and a baseball bat, which he was carrying in a backpack. The officials, speaking on the condition of anonymity, said detectives believe Green could have inflicted far more serious damage with the more high-powered weapon, if he had chosen to do so. The Washington Post Three people are dead and one wounded after a shooting in a known drug house near Salt Lake City on Tuesday morning, police said. The fourth individual was taken to the hospital and considered to be in critical condition. Police sought David Fresques, 25, after the shooting at a home in the city of Midvale. Deseret News A man was killed and four other people were hurt in a shooting at a home in Vallejo, Calif. When police arrived, they found Oscar Garcia, 22, dead and another man wounded. Police then learned that three other people, a man and two women, had been shot at the home and were already being treated at hospitals. No arrests have been made. SF Gate/Associated Press People scattered in terror Monday night as a gunman fired two bursts of bullets at passing vehicles near an Oakdale, Minn., grocery store, killing a 10-year-old boy and wounding two others. The 33-year-old gunman, who was in police custody Monday night, began firing a handgun about 6:10 p.m. while standing in the street. The shootings appeared to be entirely random, prompting Oakdale police Capt. Jack Kettler to say, "God only knows what motivates someone to do this. It's happening way too often. The Star Tribune Two women have been killed in a shooting at a home in Hilo, Hawaii, Monday night. 34-year-old Sean Ivan Masa Matsumoto has been taken into custody. Police say two children in the home at the time were not injured. They have been placed in the care of family members. A 16-year-old city boy is dead following a shooting on Beakes Street in North Trenton, N.J., on Tuesday. Marcus Hunter was shot dead by an unknown assailant. Police did not have a full description of the gunman and the motive in the crime was not immediately clear. As police began their investigation, the body lay on the sidewalk in front of a gated parking lot, covered by a white sheet stained with blood. NJ.com Joshua Johnson, 4, was playing with a gun Monday at a Memphis apartment complex when it went off. He was pronounced dead on the scene. At this point, no arrests have been made, but detectives are still working to figure out where the gun came from, how the boy got it, and who, if anyone, was supervising him at the time of the shooting.