Cop Killer Claimed Police Targeted Him With 'Ultra Sonic Waves'

A man who shot and killed a rookie California police officer last week left a note claiming that police had targeted him with "ultra sonic waves meant to keep dogs from barking."

On Saturday, police identified Kevin Douglas Limbaugh, 48, of Davis, California as the man who shot and killed Officer Natalie Corona, 22, when she was responding a vehicle collision Thursday night in Davis.

Davis police Lieutenant Paul Doroshov told SFGate.com that a note was found in Limbaugh's apartment in which he described being hit by the "waves."

"The Davis Police department has been hitting me with ultra sonic waves meant to keep dogs from barking," reads the note, which was typed on a computer. "I notified the press, internal affairs, and even the FBI about it. I am highly sensitive to its affect (sic) on my inner ear. I did my best to appease them, but they have continued for years and I can't live this way anymore."

In the interview, Lieutenant Doroshov said the note was left face up on Limbaugh's bed and he could not speculate why it had been placed there.

Investigators also found two semiautomatic handguns inside the house, a 9 mm and a .45-caliber, not registered to Limbaugh, Doroshov said.

Corona was at the scene of a three-vehicle collision when Limbaugh rode up on a bicycle and opened fire on her in what police have described as an "ambush" attack. He was not one of the people involved in the collision.

After shooting Corona, Limbaugh shot at other people on the scene, including a fire fighter whose boot was hit by a bullet and a woman, whose backpack was hit. No one else was injured.

Limbaugh dropped his backpack at the scene and information inside allowed police to trace him to a house about a block away. When police surrounded the property he stepped outside wearing a bullet proof vest, shouted at officers and then entered the property again and shot himself dead, police said.

Limbaugh had been ordered last fall to surrender a semiautomatic weapon after a battery case in which he was accused of punching a co-worker in the face, the Sacramento Bee reported.