Federal safety investigators say the driver of a Fedex tractor-trailer that struck a bus carrying high school students didn't appear to brake before a fiery collision that left 10 dead.
National Transportation Safety Board member Mark Rosekind said Saturday that the truck left no tire marks as it careened across a median and slammed into the bus taking the students to a college tour in Northern California.
Investigators also interviewed a witness who said the truck was already on fire before it crossed the median.
The truck and bus exploded into towering flames after Thursday's crash, making it difficult for investigators to determine whether a fire started in the truck. But Rosekind says investigators plan to look at a blood test and other physical evidence to make that determination.
Previously: A tractor-trailer already was on fire as it came across a median and crashed into a tour bus, killing 10 people, according to a couple whose car was sideswiped by the big rig.
Joe and Bonnie Duran were driving a sedan northbound on Interstate 5 on Thursday when they said a FedEx truck heading south careened toward them, struck their rental car and crashed into the oncoming bus carrying high school students from Southern California. The bus and truck quickly were engulfed in flames.
Bonnie Duran, who was driving, told KNBC-TV in Los Angeles that flames were coming from the lower rear of the truck cab.
"I just looked to the left and there it was coming through right at me at an angle. I can tell I wasn't going to outrun him so I just kind of turned to the right and he hit me," she said.
"It was in flames as it came through the median...It wasn't like the whole thing was engulfed, it was coming up wrapping around him," Duran told KNBC.
KNBC reported the Durans will be interviewed Saturday by the California Highway Patrol before flying home to suburban Seattle. A CHP spokesperson did not immediately respond to a request for comment Saturday.
National Transportation Safety Board investigator Mark Rosekind told the Today Show that they're aware of the account. He said his team was “still in the early phases of collecting our factual information,” including other witness statements.
Investigators had not mentioned the possibility that the truck was on fire before the crash. Police also initially said the sedan and truck were traveling in the same direction when the truck swerved to avoid the sedan.
Five students from the Los Angeles area, three chaperones and the truck and bus drivers died in the crash about 100 miles north of Sacramento. Dozens were injured, some critically.
The bus was carrying 44 students to visit Humboldt State University in far Northern California. Michael Myvett and his fiancee, Mattison Haywood, both from Los Angeles, were two of four chaperones.
That Myvett, who graduated from Humboldt with a psychology degree in 2007 and worked with autistic children, was eager to make the trip with the woman he proposed to on bended knee in Paris last December made sense to friends and co-workers.
Haywood was "the love of his life" and "to be a liaison and representative for high school students who wanted to attend Humboldt was in sync with his personality, wanting to facilitate peoples' achievement of their dreams," said Kyle Farris, a colleague at the Center for Autism and Related Disorders in Torrance.
A fundraising page has been set up for Myvett's family through GoFundMe.
The bus carried a lot of dreams. It was one of three chartered to bring prospective students, many of them hoping to be the first in their families to attend college, to tour Humboldt before they got busy with prom and graduation.
"I can only imagine the excitement of these high school students as they were on their way to visit a college campus, and the pride of the adults who were accompanying them," U.S. Secretary of Education Arne Duncan said in a statement. "Our young people are our greatest treasure, and this loss is heartbreaking."
Desperate families awaited word about loved ones Friday, while investigators tried to figure out why the FedEx truck swerved across the grassy divide.
The Serrato family, whose identical twin 17-year-old daughters set off on the adventure on separate buses Thursday, had a panicked, sleepless night. Marisol made it to their destination but the family had no word on Marisa for nearly 24 hours.
They received the official word Friday evening when dental records confirmed Marisa was among the dead.
"Marisol is devastated," the girls' 23-year-old brother Miguel Serrato said.
Another victim was Adrian Castro, 19, a senior football player at El Monte High School east of Los Angeles. Castro was considering going to a state university closer to home but decided to give faraway Humboldt, home of sports teams known as the Lumberjacks, a chance, his father, Raul Castro, told the San Gabriel Valley Tribune.
"He told me two days ago, 'Should I go up and check it out anyway?'" said Raul Castro, who dropped his son off to meet the bus on Thursday morning. Later that night he got a call from Adrian's mother, who said she had heard from the California Highway Patrol that the young man had died.
Rescuers said the people who were killed were mostly at the front of the bus, or outside on the ground in front of it. Most survivors were injured, some with critical burns or broken limbs.
Those who made it out said they scrambled through a kicked-out window, and the ones who could ran or staggered to the opposite side of Interstate 5 before the bus exploded and was swept by flames.
Humboldt admissions counselor Arthur Arzola, 26, who recruited for the school in the Los Angeles area, was taken to a hospital burn unit in critical condition but died overnight. Arzola was a newlywed studying to be a school counselor at the University of LaVerne in Southern California and was set to earn his graduate degree in May, LaVerne officials said.
His passion for bringing kids to Humboldt was evident on his "Meet the Counselors" webpage. In his online bio for the job, which shows him with slick hair and broad grin in the university's forest-green colors, he said the school "provides all students on campus with incredible opportunities that change the world for the better."
"There are no words during times like these that can fully express our sadness," University of La Verne President Devorah Lieberman said.
The teenagers aboard, from dozens of different Southern California high schools, were participating in a program that invites prospective low-income or first-generation college students to visit Humboldt. They were supposed to join hundreds more potential students from across California and the West for a long weekend, paired up with existing students and staying in the dorms.
Before launching the event Friday, university Vice President Peg Blake's voice broke as she asked a crowded theater for a moment of silence in honor of everyone affected by the accident.
University president Rollin Richmond says they will welcome back the accident survivors at a time of their choice.
Neither driver had been identified as of Friday night. The bus was operated by Silverado Stages Inc., which is based in the central coast city of San Luis Obispo but operates buses throughout the West.
CEO Michael Vodarsik said only that the company was "working closely with authorities" and trying to support passengers and families of the dead.
FedEx Chairman Frederick Smith, in a statement, expressed his "deepest personal sympathies and the condolences of over 300,000 other FedEx team members to everyone involved in this accident."
The CHP and the National Transportation Safety Board were investigating, but warned it could take months to conclude what happened.
Mark Rosekind, an NTSB member, said Friday that the agency would be gathering information over the next one to two weeks. He said it will review whether the stretch of California freeway where the bus was struck should have had a barrier along the median to prevent head-on collisions.
In addition, Rosekind said it will look into the health of the truck driver, the mechanics of the vehicles and whether a fire suppression system recommended but not mandated for buses would have made a difference in the crash.
Jennifer Bonilla was the model student.
"She's one of those students who is bright and shiny and eager and ready to go," Sherlett Hendy Newbill, a teacher at Dorsey High School, told the Los Angeles Times.
Friends said Bonilla was on the bus that crashed. She remained unaccounted for after the crash.
Classmate Melvin Harris, who was asleep when the collision occurred, broke a window to jump out.
"I looked back and I saw a whole bunch of other kids breaking windows and falling on top of each other trying to get out, and I was also trying to look for my friend," he told KCAL-TV in Los Angeles.
Teacher Noah Lippe-Klein told the Times he recently wrote a letter of recommendation for a scholarship that Bonilla won.
He admired Bonilla's "ability to think critically about the world and her profound, college-level writing skills."
Denise Gomez, who played soccer at Animo Inglewood Charter High School, was among the students who remained missing.
"Great kid, sharp, energetic," Gomez's former soccer coach, Roger Flores, told KCAL-TV. "Always smiling and a little quiet, but she was a happy child. I just know she was looking forward to go out and do her college trips."
Fellow classmate Ismael Jimenez also remained unaccounted for after the crash.
"It kinda hits home because like, we're a family here at Animo. As an Animo family, we're all grieving together. It's kinda hard for us all at the moment," Jorge Camacho, who graduated last year, told KCAL-TV.
Camacho stopped by his alma mater Friday after hearing that his friends were missing.
"It's kind of like, hurtful to not hear from them every minute. Their families, I can feel what they're going through. It's really tragic to see their families took the time to go up there to see if they can find them or not and not hearing back from them is like hurtful for them," he said.
There will be a gathering for Humboldt State alumni and parents on the Los Angeles City Hall front steps and lawn from 2 to 5 p.m. Sunday, according to the Humboldt State University Alumni Association.
This story has been updated.