(CBS News) WASHINGTON - The investigation of the deadly shooting at the Sikh temple in Oak Creek, Wisconsin took a surprising turn Wednesday. It turns out it was not the police who killed the gunman.
The FBI revealed the deadly spree at the Wisconsin Sikh temple ended when gunman Wade Michael Page killed himself.
Police cruiser video, which is being held as evidence, captured the gruesome scenario. Page wounded the first responding officer, shooting him at least eight times.
Lead FBI agent Teresa Carlson said a second officer then shot Page in the stomach, "thereby neutralizing the threat. And by the way, I've seen the video. It's an amazing shot and thank goodness."
The wounded Page then raised his 9mm pistol to his own head and pulled the trigger.
Page, who played with white-power bands and associated with racist groups, left behind no note explaining his actions. And searches of Page's car, apartment and storage locker have turned up few clues.
FBI agents have conducted 100 interviews and are chasing more than 100 leads.
"After all of this work, we still have identified no one else responsible for this shooting other than him," said Carlson. "We also have not clearly defined a motive at this point."
One of those interviewed is Page's ex-girlfriend, Misty Cook. Like Page, she's been linked to white supremacist groups. She was arrested and briefly detained Sunday for illegally possessing a weapon. But investigators say there's no evidence Cook had any prior knowledge or any involvement in the attack on the temple.
Investigators now are focusing on trying to identify the "stressor" that may have caused Page to snap. They're looking at the breakup with his girlfriend, the loss of his job, and increasing isolation as possible factors.