A 34-year-old man in California may spend the remainder of his days behind bars for killing his parents after they held an intervention demanding he check into a facility to treat his mental health and substance abuse problems nearly six years ago.

The morning after he fatally stabbed his mother and father, a then-27-year-old Camden Burton Nicholson also slit the throat of their housekeeper as she arrived for work. A jury in Orange County on Wednesday found Nicholson guilty on three counts of first-degree murder in the grisly slayings of 64-year-old Richard Nicholson, 61-year-old Kim Nicholson, and 57-year-old Maria Morse, authorities announced. Jurors also convicted him on the special circumstance of committing multiple murders.

Prosecutors said that after killing the three victims, Nic

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