Bowles said the salon was busy at the time of the shooting, with every station occupied. He said it appeared that the victims were seeking shelter when they were shot. Some of the people inside managed to escape unharmed.
The 911 call came from outside of the business.
Dekraai was taken into custody a half-mile from the crime scene. Police said he was driving through a residential area in the direction of Huntington Beach, Calif.
"They had him by the shirt, and when they pulled the shirt up, they realized he had a bullet proof vest, they took that off and by that time they already had him handcuffed," said Tom Windham, who witnessed the arrest.
Police said Dekraai was cooperative at the time of the arrest and was taken to the Seal County Police Department.
Police cordoned off the light blue bungalow in nearby Huntington Beach, Dekraai's home for the past two years. Neighbors told reporters they often saw him out in the yard playing catch with his son.
"Seal Beach is a small safe community. We don't experience these things," Bowles said.