A representative from Cache Creek went on to say Limbaugh was an employee but was terminated after the September altercation.
Limbaugh was ordered last fall to surrender a semiautomatic rifle after he was convicted in a battery case.
The note left by Kevin Douglas Limbaugh of Davis, Calif., was released after Davis police identified the 48-year-old as the man who fatally shot Corona during the officer's response to a vehicle collision Thursday night.
"There have been a lot of rumors as to why this happened, why he did what he did, and we're hoping this sheds some light", Doroshov said.
Investigators also found a letter on his bed that accused Davis police of using "sonic waves meant to keep dogs from barking" against him.
In addition to the note, officers found two semiautomatic handguns inside the house, a 9 mm and a.45-caliber, Doroshov told the Sacramento Bee. I notified the press and internal affairs and even the Federal Bureau of Investigation about it.
"I did my best to appease them, but they have continued for years and I can't live this way anymore", the letter read in part.
"She was a rising star in the department", Pytel said.
Corona, 22, died within minutes of arriving at the scene of a three-car crash.
It will be open to the public, according to an announcement by Davis Police Chief Darren Pytel. In July, after graduating from the Sacramento Police Academy, Corona was sworn in as Davis officer. He struck a fire truck, the backpack of a woman nearby, a passing bus and a the boot of a fleeing firefighter. A suspect walked up and fired at Corona, he said.
Police eventually sent a robotic camera in and found the gunman had shot himself in the head.
Corona started volunteering as a community service officer with the Davis Police Department after she graduated from high school and for a time work at the department even after funding for her position ran out. The daughter of a retired Colusa County sheriff's deputy, she finished her training in December and had been on the job for a few weeks.