Earlier: 4 killed, 3 hurt in Petaluma crash

Four people were killed and two others were seriously injured in a violent collision Tuesday afternoon at a busy Petaluma intersection.

All were Casa Grande students or former students.

The driver of the car was Adrianna Delatorre, 18, of Petaluma, who graduated last year.

Also killed were passengers Kajo Phelan, 17, and Greg Kubeck, 16, both Casa Grande 11th graders, and Christina Ramirez 19, of Rohnert Park, who graduated last year.

Miguel Delatorre of Petaluma, a Casa Grande 11th grade student, suffered major injuries and was in serious but stable condition at John Muir Hospital in Walnut Creek.

Micheala Jones of Petaluma, who recently transferred from Casa Grande to San Antonio High School, was in stable condition at Petaluma Valley Hospital.

CHP Officer Chris Jacobs said the six were riding in a Ford Taurus that pulled into the T-intersection at East Washington Street and Adobe Road and hesitated in the path of a 20-foot truck.

The driver and a backseat passenger were declared dead at the scene. Two others died hours later at local hospitals, CHP Sgt. John Gray said.

The driver of the Isuzu box truck, Jonathan Lane Dougherty, 26, of Acampo, near Lodi, suffered minor injuries in the crash.

Dougherty was approaching the intersection and "just basically had nowhere to go," Gray said.

Witnesses said he was traveling 50 to 55 mph - within the posted speed limit - at the time of the 4:10 p.m. crash, Gray said.

Dougherty hit his brakes but plowed into the side of the Taurus, killing the female driver, Jacobs said.

Her passengers were trapped and had to be cut from the wreckage, authorities said.

Fire crews tried to save the passenger sitting in the middle of the rear seat, but he died at the scene, Gray said.

The other four passengers survived the impact but suffered major injuries and were taken to local hospitals, Petaluma Fire Battalion Chief Mike Haberski said.

Authorities believe the Taurus' driver intended to turn left from East Washington onto northbound Adobe Road. There is a stop sign on Washington Street, which ends at the intersection just beyond the airport on the east edge of Petaluma.

"It's my understanding they stopped or just pulled out in front of this guy," Gray said.

Investigators don't believe alcohol was a factor in the collision, Jacobs said.

One of the Taurus passengers was flown by REACH helicopter to Santa Rosa Memorial Hospital, and a second was taken in the Sonoma County sheriff's helicopter to John Muir Medical Center in Walnut Creek.

A third was taken by ambulance to Memorial Hospital, and the fourth went to Petaluma Valley Hospital.

"It was a tough deal," Haberski said.

Dougherty also was taken to Petaluma Valley Hospital but was expected to be treated and released, Jacobs said.

Gray said one of the passengers died in surgery but he didn't have further details, including at which hospitals the passengers died.

The commute-hour accident closed the busy intersection for three hours to all but southbound traffic, which was allowed to turn onto East Washington Street, Jacobs said.

Northbound traffic was detoured onto Frates Road. Eastbound traffic was turned back short of the intersection.

"It was an absolute madhouse out there," Gray said. "We had two helicopters. We had three ambulances. We had two fire departments. Traffic was just a mess."

All roads were reopened by 7:15 p.m., the CHP said.