Investigators are trying to figure out who had the right of way at the time of the incident, McGill said.
Niggemann was coming into downtown Laguna Beach on Laguna Canyon Road when she allegedly plowed into the victim, who was crossing the road several feet behind her husband, McGill said. The victim's husband did not witness the collision, but his account of the direction he and his wife were walking contradicts that of the driver.
The victim's husband said the two were crossing from the public parking lot toward the Playhouse; the driver reported they were walking from the Playhouse to the parking lot.
"We are looking at the phasing of lights and will get the black box from the car" to help determine how the incident happened, McGill said.
McGill said that skid marks show that Niggemann tried to stop. The area was busy that night, with a wedding and "Lagunatics" both going on, but there were no other pedestrians present when the incident took place, he said.
Niggemann was transported to Orange County Jail, where she posted bail and was released, McGill said.