Trial began Monday for Toby Stangel, the man prosecutors say killed a mother of 10 and fired at several other drivers on the H-1 Freeway.
Members of the Nguyen family wept and buried their faces as their youngest sister described what happened on June 3, 2011.
"I saw someone get out of the car and he walked over to the outside of his car and he lifted one hand and started shooting," said Cindy Nguyen.
Cindy and her mother Tammy Nguyen were at a stop light at Kapiolani Boulevard and Waialae Avenue when police say Stangel fired 11 shots at their minivan -- one of them hitting Tammy in the head.
"At first I didn't know what it was. I heard the sounds and I just crouched down to the floor and ducked down and then I saw my mom jerk back and her head slowly fell," said Cindy Nguyen.
Tammy Nguyen died at the died hospital. Deputy prosecutor Dwight Nadamoto said Stangel fired at seven people, including two police officers in what he described as a trail of terror from Kaimuki to Aiea.
One of the victims was Michael Pagdilao, who was waiting on Kapiolani Boulevard to get on the H-1 Freeway.
"I saw the pistol first and then he took the first shot at me, which I believe it hit the side rear door and that's where I ducked," said Pagdilao.
Stangel's defense attorney doesn't deny his client shot at these victims.
"We don't want you to believe there is someone else out there and he's the wrong person sitting here. The facts are not in dispute," said attorney John Schum.
However, Schum says his client's state of mind is in dispute.
"There's no state of mind that is going to marry up with the evidence that the state needs to show to you, that will show you that Mr. Stangel intended these acts," said Schum.
Stangel is on trial for one count of murder and seven counts of attempted murder. More victim testimony is expected this week.