MONTE SERENO  (AP) — A wealthy Silicon Valley venture capitalist was killed during a brutal home-invasion when three intruders bound and gagged him with packaging tape as they beat his wife and told her to "be quiet if you want to live," authorities said Friday.

According to unsealed police affidavits, 66-year-old Raveesh "Ravi" Kumra died on his kitchen floor from asphyxiation at his 7,000 square-foot mansion in Monte Sereno in the early morning hours of Nov. 30.

Kumra's wife called 911 to report that intruders had ransacked their home and hit her with hard object that left a gash on her lip, according to the reports.

"Be quiet if you want to live," one of the intruders told Kumra's wife who was awakened, beaten and also tied up with tape. She was dragged next to her husband who died at the scene.

Santa Clara County prosecutors have charged Deangelo Austin, 21, Javier Garcia, 21, and Lukis Anderson, 26, with murder. Prosecutors allege that Austin and Garcia committed the crime for the benefit of a street gang.

The three intruders who stole cash, jewelry and rare coins, are eligible for the death penalty, prosecutors say.

Police believe Kumra, a cellphone entrepreneur and former owner of a popular winery concert venue, was set up by a prostitute he had hired who told members of Oakland gang members about his lifestyle.

The alleged prostitute, Raven Dixon, 22, is accused of being an accessory to the killing, and faces a gang enhancement for the crime.

The unsealed police documents allege Dixon's cellphone was loaded with photos of Kumra's three-acre estate, including pictures of the gates, fences and access points, prosecutor Kevin Smith said.

Dixon allegedly had been calling Kumra about once a month for the past six months, the affidavits said.

Kumra's Google Voice account revealed that on Nov. 14 — two weeks before his death — Dixon called him again "saying she wanted to party with the victim," according to the documents.

"He declined," the affidavits added.

Dixon's family has said that she's innocent, but Smith, the prosecutor, disagrees.

"Raven Dixon is tied to this case through her actions before it, her action in lying to the police and her connection to well-known gangs who joined forces to commit the robbery and murder of Ravi Kumra," the prosecutor said.