REDWOOD CITY  (AP) — A prosecution witness won’t testify in the trial of a Northern California heiress charged arranging the 2016 murder of the father of her two children.

The San Mateo County district attorney’s office announced Monday that it’s revoking a plea deal with Olivier Adella after revelations that he contacted a defense witness.

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The judge delayed start of trial a week to next Monday.

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San Francisco Bay Area real estate heiress Tiffany Li and her boyfriend, Kaveh Bayat, are charged with the death of 27-year-old Keith Green. Prosecutors say Li, who’s free on $35 million bail, arranged his death because she feared she’d lose custody of their two children.

Adella originally was charged with murder but pleaded no contest to being an accessory. Prosecutors believe he dumped Green’s body in Sonoma County.

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