ALBUQUERQUE, New Mexico — A 15-year-old boy remained in custody as detectives tried to piece together what led to the shooting of his parents and three of their children who were found dead in a New Mexico home. The teenager was arrested on murder and other charges in connection with the shootings, which happened Saturday night at the home in a rural area southwest of downtown Albuquerque, said Lt. Sid Covington, a sheriff's spokesman, on Sunday. Authorities identified the victims late Sunday as Greg Griego, 51, his wife Sara Griego, 40, and three of their children: a 9-year-old boy, Zephania Griego, and daughters Jael Griego, 5, and Angelina Griego, 2. The suspect was identified as Nehemiah Griego. The killings come just three days after President Barack Obama presented a sweeping gun-control package that marks the most comprehensive effort to tighten gun laws in the US in nearly two decades. Obama's package was triggered by last month's school shooting in Connecticut. Authorities said each victim suffered more than one gunshot wound, and several guns were found at the home, one of which was a semi-automatic military-style rifle. Investigators were trying to determine who owned the guns. “Right now we're to the meticulous points of processing the scene and collecting physical evidence, and this is a vast scene with a lot of physical evidence,” Covington said. Authorities declined to release details of any conversation that the 15-year-old had with investigators, but they said he was the Griegos' son. The sheriff's office said he is charged with two counts of murder and three counts of child abuse resulting in death. — AP