Mother of boy who died in California mansion seeks new probe into death

This August 2008 file photo released by Horizon Eye Specialists & Lasik Center shows Rebecca Zahau. (AP/Horizon Eye Specialists & Lasik Center)

The Coronado home of Medicis Pharmaceutical Corp chief executive Jonah Shacknai is pictured in California July 14, 2011. Shacknai's girlfriend Rebecca Nalepa, 32, was discovered dead at his mansion prompting an investigation by homicide detectives, police said on Thursday. REUTERS/Mike Blake (UNITED STATES - Tags: CRIME LAW)

The Coronado home of Medicis Pharmaceutical Corp chief executive Jonah Shacknai is pictured in California July 14, 2011. Shacknai's girlfriend Rebecca Nalepa, 32, was discovered dead at his mansion prompting an investigation by homicide detectives, police said on Thursday. REUTERS/Mike Blake (UNITED STATES - Tags: CRIME LAW)

The mother of a 6-year-old boy who died after falling down stairs at a San Diego County mansion is seeking to reopen the investigation into his death.

U-T San Diego reports that Dina Shacknai and her representatives met with Coronado police and county medical examiner's staff last week. They presented results from two hired experts that concluded the July 2011 death of Max Shacknai was likely the result of an assault.

Authorities have concluded that Max -- the son of pharmaceutical tycoon Jonah Shacknai -- accidentally plunged over a stairwell banister while in the care of his father's girlfriend, Rebecca Zahau.

Two days after the fall, Zahau's nude, bound body was found hanging in the mansion.

That death was ruled a suicide but Zahau's family is challenging that ruling.