What police found at the scene after woman's mysterious California mansion death

PHOTO: Rebecca Zahau was found hanging at a California mansion, and while her death was ruled a suicide by authorities, her family is seeking justice.PlayCourtesy Mary Zahau-Loehner
WATCH What happened when expert attempted to tie same knot as woman mysteriously found dead

Rebecca Zahau was 32 years old when she was found dead July 13, 2011, at a Coronado, California, mansion.

The home belonged to her boyfriend Jonah Shacknai, who founded Medicis Pharmaceutical, a company ultimately worth billions of dollars.

PHOTO: Rebecca Zahau was found dead at her boyfriends California mansion on July 13, 2011,l and her death was later ruled a suicide.Courtesy Mary Zahau-Loehner
Rebecca Zahau was found dead at her boyfriend's California mansion on July 13, 2011,l and her death was later ruled a suicide.

At the time of Zahau’s death, Jonah Shacknai was at the hospital, where his 6-year-old son Max was in critical condition after falling from a second-story landing in the mansion. Three days later, Max died of his injuries.

It was Jonah Shacknai’s brother, Adam Shacknai, who discovered Zahau’s body and called 911. Adam Shacknai had flown to California from his home in Tennessee after Max’s tragic accident.

“I got a girl, hung herself ... it's on Ocean Boulevard across from the, hotel,” Adam Shacknai told the 911 operator.

He said that Zahau’s body was hanging from a balcony and that he was able to cut her down from the red rope she was tied with. He also told the 911 operator that he had desperately tried to resuscitate her.

When authorities arrived that morning, they found Zahau’s body completely nude. Her feet were bound, and her hands were tied behind her back. A shirt was stuffed into her mouth.

With two mysterious deaths at the same house in the span of a few days, the San Diego Sheriff’s Department launched a full investigation.

Seven weeks after Zahau and Max’s deaths, the San Diego Sheriff’s Department announced its findings: Max’s death was an accident and Zahau’s official cause of death was suicide.

PHOTO: Rebecca Zahau is pictured with her boyfriend Jonah Shacknai in this undated photo.
Obtained by ABC News
Rebecca Zahau is pictured with her boyfriend Jonah Shacknai in this undated photo.

When it came to Zahau’s death, investigators said an autopsy as well as DNA and fingerprint analyses showed no signs that she had been attacked.

Zahau’s family was outraged over the investigation’s findings.

“Rebecca does not have a suicidal personality at all,” her sister Mary Zahau-Loehner told ABC News’ “20/20.”

Nearly seven years after Zahau's mysterious death, her family's wrongful-death lawsuit is now going before a jury in San Diego federal court.

Zahau-Loehner and her mother Pari Zahau believe she was murdered and are seeking unspecified damages in a civil trial that began this week.

PHOTO: Adam Shacknai, the brother of Rebecca Zahaus boyfriend Jonah Shacknai, called 911 after discovering Rebecca Zahaus body.Obtained by ABC News
Adam Shacknai, the brother of Rebecca Zahau's boyfriend Jonah Shacknai, called 911 after discovering Rebecca Zahau's body.

The wrongful death lawsuit names Adam Shacknai as the one responsible for her death. The Sheriff's Department told ABC News it would examine any new evidence that should emerge. Adam Shacknai declined ABC News' requests for comment. Authorities cleared Adam Shacknai in Rebecca's death years ago, and he has denied any involvement in her death.

Read on to see some of what the San Diego Sheriff’s Department found at the scene of Rebecca Zahau’s death, and watch the full story on ABC News’ “20/20” TONIGHT at 10 p.m. ET.

PHOTO: This message was found on a door when police arrived to the mansion where Rebecca Zahau was found dead.Courtesy San Diego Sheriffs Department
This message was found on a door when police arrived to the mansion where Rebecca Zahau was found dead.

The message

A message was found painted on a door in Zahau’s room, saying: “She saved him, can he save her.”

PHOTO: The mansion balcony where Rebecca Zahau was found hanging is pictured here.Courtesy San Diego Sheriffs Department
The mansion balcony where Rebecca Zahau was found hanging is pictured here.

The balcony

Zahau was found hanging from a balcony outside of her room. San Diego Sheriff’s Department investigators said only Zahau's toe and heel prints were found on the balcony, along with a man's boot print, which they determined was left by a detective.

PHOTO: Rebecca Zahau, who was discovered dead in 2011, was found with these knots tied in rope around her hands.Courtesy San Diego Sheriffs Department
Rebecca Zahau, who was discovered dead in 2011, was found with these knots tied in rope around her hands.

The knots

Zahau’s feet were found bound at the ankles, and her hands were tied at the wrists behind her back with a red rope.

VIDEO: What happened when expert attempted to tie same knot as woman mysteriously found deadPlay
What happened when expert attempted to tie same knot as woman mysteriously found dead

PHOTO: Evidence inside the mansion bedroom Rebecca Zahau entered before her death is pictured here.Courtesy San Diego Sheriffs Department
Evidence inside the mansion bedroom Rebecca Zahau entered before her death is pictured here.

The red rope

The other end of the red rope that Zahau was hanging from was tied to her bed.

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