Parts of a vehicle consistent with a Honda were found, as well as "various personal items that were consistent with a family traveling on vacation", according to a news release from the California Highway Patrol.
The county coroner is working on recovering the body, which Van Patten believed at 1:10 p.m. was still in the water.
Members of the Hart family pictured at the annual celebration of "The Goonies" movie in Astoria.
Jennifer, Sarah, and three of their children were confirmed dead in the coastal cliff crash.
A woman's body has been found in a Northern California river, where a missing Valencia family's vehicle is believed to be submerged.
Investigators began to examine the possibility that the disappearance might be linked to a report that the highway patrol received on April 6 of a vehicle plummeting into the Eel River from USA 101, a north-south highway that runs through Washington State, Oregon and California.
Police have said a search of the family's home in Woodland, Washington, turned up no suicide note.
Her wife, Sarah Hart, and two of the couple's six children had "a significant amount" of an ingredient found in allergy medication Benadryl, which can result in drowsiness, in their systems, according to toxicology tests.
Under California law, it is illegal to operate a motor vehicle with a BAC of 0.08% or higher.
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The Mendocino County Sheriff said during a Friday news conference that the body was found about 7 miles south of where the Thottapilly family's auto is believed to have gone off an embankment.
However, the California Highway Patrol has not concluded why the vehicle went off an ocean overlook.
"We believe that the Hart incident was in fact intentional", he said.
On April 6, a auto was reportedly submerged in the Eel River, a little north of the town of Leggett, during heavy rains.
Patricia continued: "My eldest son's father died when he was one, and the other children's fathers just don't bother with their kids", she said. Two kids' bodies are missing and a third body has been found but wasn't identified.
The 100-foot (31-meter) drop killed the women, both 39, and their children Markis Hart, 19; Jeremiah Hart, 14; and Abigail Hart, 14. Their three other adopted children are missing, 16-year-old Hannah Hart, 12-year-old Sierra Hart and 15-year-old Devonte Hart, who is known for a viral photo in which he is hugging a police officer in November 2014.
We visited Downs' family this morning and spoke with her 82-year-old grandmother, who is devastated by her loss, and who said that she is planning on selling her property, a place where she grew up as a child, and going to live elsewhere.
A family of four taking a West Coast road trip vanished about 30 miles from the site of the Hart family crash, authorities said this week.