Finally, late on Thursday, the highway patrol said there had been no sign of the missing people, but the recovered objects - the vehicle parts and personal items - were confirmed by family members as belonging to the Thottapillys.
Though the mysterious seaside auto crash, involving 15-year-old Devonte Hart, his five siblings and his adoptive parents remains under investigation, more details are emerging of the family's troubled history.
The 911 call was at least the fourth report of suspected child abuse in the Hart family in the past seven years as the family moved between three states in a case that has raised red flags about the ability of authorities to track known offenders.
Carpenter said the family stopped in the small town of Naselle, Washington, near their home, during their drive to the California cliff but that investigators are still trying to determine why they stopped there and whether they contacted anyone. The Washington State Department of Social and Health Services said the "now deceased children were identified as potential victims of alleged abuse or neglect", CNN reported.
The crash killed Jennifer Hart, 38, Sarah Hart, 38, Markis Hart, 19, Jeremiah Hart, 14, and Abigail Hart, 14.
"It appears she (Hart) was about 70 feet from the edge and accelerated from there", Carpenter said.
The crash scene, about 200 miles (322 km) north of San Francisco, was discovered by a passing motorist on March 26.
A woman who reported Devonte Hart's parents to OR child welfare officials almost five years ago is now pushing for the creation of a national child abuse registry.
Allman said "there were no skid marks, there were no brake marks".
The former friend said authorities told her the children had been interviewed and were likely coached in their responses.
Long before the crash, Sarah Hart pleaded guilty in 2011 to a domestic assault charge in Minnesota over what she said was a spanking given to one of her children.
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. Child services officials attempted to visit the Harts on March 23, after neighbors reported that one of the children, Devonte, had come to their house multiple times asking for food.
Frkovich did not immediately respond to a request for comment.
Devonte, who captured the hearts of America in November 2014 when a photo of him hugging a police officer during a Ferguson-related rally in Portland went viral, told DeKalb and his wife that his parents withheld food as punishment.
The Mendocino sheriff's office has called for a noontime press conference Friday in Leggett.
On the second trip, Jennifer Hart and the six children stayed for two weeks without Sarah.
Hannah Hart, 16, fled the home one night and told the neighbors "the moms were racist and were abusing her" and that "she was being whipped with belts", the records showed.