"Preliminary results showed Jennifer Hart had a.102 BAC (blood alcohol content)", the Mendocino County Sheriff's Office said in a statement on Friday.
In California, a person is legally drunk if they have a BAC of.08 or higher. According to toxicology reports, her wife Sarah and two of their six children had a significant amount of an ingredient found in allergy medications that cause drowsiness.
A woman's body was found by rescuers in the United States during the search of a missing Indian family of four who are feared drowned in a swollen river in California, officials said.
Investigators have not come up with a motive but say it appears the incident was intentional, The FBI is deploying their Behavioral Analysis Unit to assist and try to understand what happened.
Five bodies were found March 26 near Mendocino and a body was pulled out of the surf last weekend but its identity was not immediately identified.
"These items were of a personal nature and will not be described further at this time, but it does confirm the fact the vehicle that was seen going into the river was that of the Thottapilly family", the California Highway Patrol said. The bodies of three of their children - Markis, 19, Jeremiah, 14, and Abigail, 14 - were found nearby.
Police hadn't found the bodies of Devonte Hart and his adoptive sisters, 16-year-old Hannah Hart and 12-year-old Sierra.
Authorities have said data from the vehicle's software suggested the crash was deliberate, though the California Highway Patrol has not concluded why the vehicle went off an ocean overlook on a rugged part of coastline.
Personal belongings of the four members of the family from Santa Clarita in California, who were believed to be travelling through Humboldt and Mendocino County on US-101 while on a vacation, were also found by the team over a two-day period on Tuesday and Wednesday, officials said.
A neighbor of the Harts in Woodland, Washington, had filed a complaint, saying the children were apparently being deprived of food as punishment.
Investigators initially said they discovered the body of a child, but later said a woman's body was found. Police confirmed that Jennifer, Sarah, and their three children were dead.
The family was reported missing that Sunday.