 The New Mexico teenager accused of gunning down five family members over the weekend ambushed his father as he returned home from an overnight shift at a rescue mission, then reloaded his rifles and planned to go to a Wal-Mart and randomly shoot people, authorities said Tuesday. Griego is charged with killing five family members on Jan. 19, 2013, including his father, mother,... (Associated Press) 
 
 Instead, 15-year-old Nehemiah Griego texted a picture of his dead mother to his 12-year-old girlfriend, then spent much of Saturday with the girl and her family, authorities said. Sheriff: Teen suspect in murder of family learned to shoot from father 
 
 Bernalillo County Sheriff Dan Houston says murder suspect Nehemiah Griego learned to shoot from his father, and the two often went shooting together with guns that were not kept locked up in the home. Houston said Griego had planned the shootings for at least a week, but it's unclear if he ever actually went to a Wal-Mart or why he changed his mind about continuing the attack, which occurred the same day thousands of gun advocates gathered peacefully at state capitals around the country to rally against stricter limits on firearms. Houston also said Griego may have intended to kill the parents of his 12-year-old girlfriend. Houston revealed that fact during a grim news conference Tuesday that detailed the murders of five members of the Griego family Saturday in their South Valley home. Griego apparently had told others of his plans, but whom and when was still under investigation, Houston said. The teen waived his right to arraignment in adult court Tuesday on charges of murder and child abuse resulting in death and a judge ordered him held without bond. The sheriff's office identified the victims as Greg Griego, 51, his wife, Sarah Griego, 40, and three of their children: a 9-year-old boy, Zephania Griego, and daughters Jael Griego, 5, and Angelina Griego, 2. The weapons used in the killings – a .22 rifle and an AR-15 rifle - belonged to his parents and were in the home legally, Houston said. He said he killed his siblings after they woke up and became upset, then grabbed a military-style assault rifle his parents owned and waited in the downstairs bathroom to ambush his father as he returned from work at a rescue mission around 5 a.m. 
 
 Griego told authorities he then reloaded the two guns and put them in the family van. Instead of killing more people, Griego went to Calvary Church, where he spent several hours with his girlfriend and others. While he was there, Griego told church officials several stories about what happened to his family. The teen had no history of mental illness and drugs and alcohol did not appear to play a factor, Houston said. He said Griego also told police he regularly played the violent video games “Modern Warfare” and “Grand Theft Auto,” although his parents did not allow it. He did not say whether he believed the games were a factor. Greg Griego, a pastor and former gang member, had an extensive record but was not believed to have ever been convicted of a felony, he said. "This is beyond any human reasoning or understanding," Houston said.
– Police near Albuquerque released new details about 15-year-old Nehemiah Griego, who is accused of shooting to death his parents and three siblings over the weekend: Griego shot his mother while she slept about 1am Saturday, say police. Then he allegedly killed his 9-year-old brother, described as "awake and distraught" at the time; his sleeping 2-year-old sister; and his 5-year-old sister, who also was awake. Police say Griego waited for his father to return from work about five hours later and ambushed him with an assault rifle, reports KOB. His father had taught him how to shoot. "The motive, as articulated by the suspect, was purely that he was frustrated with his mother," said Bernalillo County Sheriff Dan Houston. "He did not give any further explanation." Griego texted a photo of his slain mother to his 12-year-old girlfriend, and spent much of Saturday with the girl at a church where his father had been a pastor. It's not clear whether she will face charges. Griego likes violent video games, including Modern Warfare and Grand Theft Auto, but Houston didn't speculate on whether he thought that played a role, reports AP. Griego planned the attack for more than a week, but he abandoned his original intention of killing more people at a local Walmart.