The deaths of a family-of-eight who drove their car off a 100-foot cliff were killed in a "murder-suicide," an inquest has heard.
Jennifer Hart and her partner Sarah, both 38, killed their six adoptive kids, after researching about suicide online.
A jury at the two-day inquest decided the two women ploughed the GMC Yukon off the cliff at 90mph in Mendocino, California, in March last year.
Speaking after the verdict, Mendocino County Sheriff-Coroner Thomas Allman said: "This was held so the truth can come out.
"We needed to know the facts of this case."
The tragic children were Markis, 19; Hannah, 16; Devonte, 15; Jeremiah, 14; Abigail, 14; and Ciera, 12.
Devonte's remains have never been found.
Devonte, an African-American, drew international attention in 2014 when he was photographed embracing a white police officer at a rally to protest the shooting of a black teenager in Ferguson, Missouri.
The two Hart women died by suicide, Allman said. The deaths of the six children were ruled to be murders.
There was no known motive, Allman said.
Jennifer Hart is thought to have driven the car off the cliff three days after child protective services in Washington state opened an investigation into allegations she and her partner had neglected or abused the children.
A police autopsy has shown that Jennifer Hart was legally drunk at the time of the crash.
Three children, along with Sarah Hart, tested positive for an ingredient commonly found in the allergy drug Benadryl, which can make people sleepy, the sheriff's office has said.
"The Hart family is hopefully resting in peace," Allman said in officially closing the case.
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