The father of the gunman who killed nine people at an Oregon community college says he had no idea his son had guns. He also believes gun laws should change. Ian Mercer, the father Christopher Sean Harper-Mercer, lives in California. His 26-year-old son had been living in Oregon. Ian Mercer tells CNN that he's struggling to understand how and why the shooting happened and that he was stunned to learn his son had accumulated so many guns. Authorities say Harper-Mercer had 14 guns and took six to the campus. Ian Mercer also tells CNN his heart goes out to the grieving families. The father says there's talk about gun control after shootings such as the one in Oregon but nothing is done. He says Thursday's attack at Umpqua Community College in Roseburg would not have happened if his son had not been able to get guns. Meanwhile, authorities in Douglas County, Oregon, say Harper-Mercer took his own life as officers arrived.