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Dianne Ogden-Halder, a talent coordinator, casting director and former assistant to Phil Spector who testified at his trial, died of undetermined causes Dec. 29 in Park City, Utah. She was 61.

She was one of four women who testified as a witness in the Phil Spector murder trial in Los Angeles, describing how Spector brandished a gun near her a party in 1989.

She began as a production assistant on “The Midnight Special” and as an executive assistant to Burt Sugarman. She went on to book talent for shows and specials including the Billboard Music Awards, the Gala for President Bill Clinton at the Ford Theater, the World Music Awards and the first Latin Grammy Awards.

She also worked on the Grammy Awards as a talent coordinator for 18 years, and cast Jim Carrey in his first major film role in “Once Bitten.”

She is survived by her husband, Steven Halder; a daughter; a son; a stepson; a sister; a brother; three grandchildren and two step-grandchildren.