Griego told investigators he hoped to end his spree "at a Walmart, with mass destruction, " Bernalillo County Sheriff Dan Houston told reporters.

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Bernalillo County Sheriff Dan Houston said a 15-year-old boy, who "may be a family member, " has been charged with two counts of murder and three counts of child abuse resulting in death.

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Dan Patrick, a Houston Republican who is sponsoring legislation to train armed teachers for classroom gunfights.

WSJ: Even in pro-gun states, bid to arm teachers stalls