Gunman's mother apologizes to US shooting victims

She said that she was glad he was in a place where he could not harm anyone anymore

The mother of the gunman who shot dead 12 people at a US navy base this week said today she doesn't know why Aaron Alexis opened fire, but she is glad he can no longer hurt anyone else.

Cathleen Alexis read a brief statement inside her New York home, her voice shaking. She did not want to appear on camera and did not take questions.

"I don't know why he did what he did, and I'll never be able to ask him why. Aaron is now in a place where he can no longer do harm to anyone, and for that I am glad," Cathleen Alexis said. "To the families of the victims, I am so, so very sorry that this has happened. My heart is broken."

Her son was killed in a shootout that ended a rampage that lasted more than half an hour.

His motive was not known. Law enforcement officials and others have said Aaron Alexis, 34, heard voices and believed he was being followed. He recently told police in Rhode Island he heard voices harassing him, wanting to harm him. He couldn't sleep. He believed people were following him, using a microwave machine to send vibrations to his body.

He was a naval defense contractor, and on August 7, police alerted officials at the Newport Naval Station about his call. But officers didn't hear from him again.

By August 25, Alexis had arrived in the Washington area, continuing his work as an information technology employee for a defense-related computer company. He suffered from serious mental problems and was undergoing treatment from the federal Department of Veterans Affairs, according to the law enforcement officials.

But Alexis wasn't stripped of his security clearance, and he kept working.

Yesterday, he visited a gun range in Virginia, not far from the nation's capital. He rented a rifle, bought bullets and took target practice, then bought a shotgun and 24 shells, according to the store's attorney.

On Monday, Alexis entered the sprawling Washington Navy Yard, which is protected by armed guards and metal detectors where employees must show IDs to get past doors and gates.

He had his pass for base access and the shotgun.

He opened fire around 8:15 a.M., shooting down from a fourth-floor overlook and third-floor hallway into a glass-walled cafeteria.

Alexis also took a handgun from an officer. He fired at police and workers in gun battles that lasted more than half an hour. The FBI says the average mass shooting is over within minutes and often ends once police arrive. Alexis was killed in a shootout.