Homeschooled teen who killed family with AR-15 plotted Walmart mass shooting

Houston said that Griego had waited for his mother to fall asleep before gaining access to her unlocked bedroom closet to obtain an AR-15, a .22 rifle and two 12-gauge shotguns. Some of the weapons had been purchased by the father through private sales, the investigation found.

“The teen told authorities after killing his family he reloaded his weapons so that he could ‘drive to populated area to murder more people,’” KRQE reported. “He expressed a desire to shoot people at random and eventually be killed while exchanging gunfire with law enforcement.”