HONOLULU (HawaiiNewsNow) - Daniel Kahanaoi said he went to Craig Kimsel's Kailua home last year, looking for his girlfriend, Rusty Anoba.
Under questioning from defense attorney John Schum, Kahanaoi said that's when Kimsel reached for a gun.
"What did you do?" Schum asked.
"I grabbed it," Kahanaoi answered.
"You grabbed what?" Schum continued.
"The gun," Kahanaoi said. "I thought he was going to try to shoot me."
Kahanaoi told the jury the two men struggled, he pushed Kimsel then fell backwards as the gun went off.
The bullet hit Kimsel in the neck.
Kahanaoi said he shot again when he thought Kimsel was reaching for what looked like a knife on the floor.
"What do you think he's going to do with that knife?" Schum asked.
"I thought he was going to hurt me," Kahanaoi answered.
The autopsy said the bullet to the back damaged Kimsel's liver and heart and killed him.
Deputy prosecutor Jeen Kwak showed Kahanaoi a picture of Kimsel's shorts, hinting it would be hard to hold a gun in its elastic waistband.
She questioned why Kahanaoi didn't use his cell phone to call for help.
"You could have called 911 for an ambulance to get him help," she said.
"Yes. But I was sure everybody else was going to call 911," Kahanaoi said.
He said he left the house and thought about going to police but was afraid, so he threw the gun out his car window.
The weapon has never been found.
Kahanaoi denied threatening to kill Anoba and Kimsel if he found the ex-lovers together.
He could get a life sentence if he's found guilty of murder.