The discovery Saturday could be the first significant break almost two weeks after investigators say the GMC Yukon was intentionally driven off the scenic Pacific Coast Highway.
During the investigation, police discovered the vehicle was pinned at 90 miles per hour. A third bystander pulled the body onto the beach. They remain in Fort Bragg for about a day, authorities said.
The bodies of Jennifer and Sarah Hart, both 38, were found inside their SUV March 26.
The three children whose remains were found at the scene were identified as Markis, 19; Jeremiah, 14; and Abigail, 14.
In a statement, Lieutenant Shannon Barney said that California Highway Patrol was alerted at 1:58 p.m.to a body located in the surf of the Pacific Ocean at Juan Creek and Highway 1 in Westport.
The California Highway Patrol revealed last week that the crash was not an accident, raising questions about the family's history and what may have preceded the crash.
Preliminary data from the air bag module and the car's software indicate the vehicle stopped at the turnout and then accelerated for about 70 feet off the cliff, Baarts says. Authorities also found no skid marks at the edge of the Mendocino County cliff.
Child Protective Services in Washington confirmed they opened an investigation into the Hart family on March 23.
She is sentenced to community service and one year of probation.
She is charged with malicious punishment of a child and misdemeanor domestic assault, according to Minnesota court records. But according to the Oregonian, the girl, Abigail, told police that Jennifer Hart was the one who had hit her.
In 2013, a former friend of the Hart family told child welfare officials in OR in 2013 that Jennifer and Sarah Hart deprived the kids of food as punishment.
Police conduct a search warrant at the Hart family home in Washington state and seize a laptop and iPad. There, the couple's neighbors recalled unusual encounters with the Hart children. The teen also asked him and his wife to call Child Protective Services, DeKalb told The Washington Post.
In this Tuesday, Nov. 25, 2014 photo, Portland police Sgt. Bret Barnum, left, and Devonte Hart, 12, hug at a rally in Portland, Oregon.
A family is mourning the loss of their daughter after she was killed in a house fire on Easter.
Jessica Doody has the mental age of a 14-year-old. Officials said the cause of death was unknown.
Anyone who came in contact with the Hart family or has any information regarding the time leading up to the crash is asked to call the California Highway Patrol, Ukiah area office at 707-467-4000 or the Mendocino County Sheriff's Office at 707-463-4086.
In the affidavit requesting the search warrant, a Clark County sheriff's deputy says he is seeking evidence on what happened to the family, including possible suicide notes.