Screenshot via Hawaii News Now.
Deedy's trial, now in its 19th day, continues today.
During his first day of testimony, Deedy said he intervened after seeing Elderts and a friend harassing a customer in a Waikiki McDonald's in November 2011, reports Hawaii News Now.
"After I said, 'Nobody here wants to fight,' his immediate response was, 'I'll f**k you up,'" said Deedy.
In mid-July, jurors watched surveillance video from the night of the fatal shooting. A raw 19-minute clip has been posted at Hawaii News Now. The video shows a physical confrontation between Deedy and Elderts. It also shows Elderts pushing Deedy backward and he topples into a hand sanitizer stand.
Deedy fired three shots at Elderts, hitting him once in the chest. Deedy is a special agent with the U.S. State Department.