Suspect arrested in fatal stabbing of girlfriend in Laguna Hills

A 25-year-old-man was arrested for his alleged role in the fatal stabbing of his girlfriend in Laguna Hills, authorities said Sunday.

Derek Pinski was arrested about 8:30 p.m. Saturday in Mesa, Ariz., Orange County sheriffs officials said. Pinski allegedly had fled from a home in the 22000 block of Caminito Tasquillo, where his girlfriend, Alexandra Joyce Tang, had  been stabbed, authorities said.

Tang, 24, was a resident of Santa Barbara.

Pinski had been named a "person of interest" after the crime and will be extradited to Orange County once investigators have finished gathering evidence in Arizona, according to a sheriff's spokeswoman.

Sheriff's deputies responded to an "unknown trouble"' call around 11:15 a.m. Saturday at the Caminito Tasquillo address, where they discovered the homeowner performing CPR on Tang.

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— Jason Song