Gas station confrontation
It was November 23, 2012, when Dunn pulled into a gas station in Jacksonville, parking next to a red Dodge Durango with four teenagers inside.
The teens had come in for gum and cigarettes; Dunn, meanwhile, had just left his son's wedding with his fiancee, who'd gone inside the convenience store for wine and chips.
Dunn didn't like the loud music -- "rap crap," he called it -- coming from the teens' SUV. So he asked them to turn it down.
What followed next depends on whom you believe. Dunn says Davis threatened him, and he decided to take matters into his own hands upon seeing what he thought was the barrel of a gun sticking out of the Durango.
But prosecutors say it was Dunn who lost control, firing three volleys of shots -- 10 bullets total -- at the SUV over music he didn't like.
After learning almost six hours later that he had killed Davis, Dunn testified that he became "crazy with grief," experiencing stomach problems for about four hours before taking a nap.
"My intent was to stop the attack, not necessarily end a life," he testified. "It just worked out that way."
Yet Rouer testified that Dunn had never mentioned any weapon to her -- be it a shotgun, a stick, a barrel or a lead pipe.
In fact, police found a basketball, basketball shoes, clothing, a camera tripod and cups inside the teenagers' Durango. There was no gun in the vehicle.
Dunn himself never called police. The first contact he had with them was at his home in Satellite Beach as he was being apprehended.
Arguing that he wasn't in a rational state of mind, Dunn admitted, "It makes sense that I should have (contacted authorities). We didn't. I can't tell you why."
Ron Davis told ABC he wants another trial.
"I want Michael Dunn to be tried and found guilty of killing my son, letting him know that it was wrong to kill my unarmed 17-year-old," Davis said. "All the other 17-year-olds out there, they shouldn't have to fear the adults with the guns that are running around here shooting them at will."