LIVERMORE (CBS SF) — Authorities said a mentally ill Livermore man was taken into custody Wednesday night after allegedly stabbing his mother and grandmother, fatally injuring the grandmother.

On November 9 at 7:38 p.m., police in Livermore responded to the 5300 block of Hillflower Drive after a report of an assault with a deadly weapon.  Officers arrived on scene and found two female residents suffering from stab wounds.

The suspect had fled the residence prior to the officers’ arrival.

Officers determined revealed the suspect, 35-year-old Tyler Haskell, had stabbed his grandmother and mother with a kitchen knife.  Haskel’s 85-year-old grandmother Joan Lininger succumbed to her injuries. His 62-year-old mother Karla Haskell was hospitalized with non-life threatening injuries.

Officers searched the surrounding neighborhood and found Haskell approximately one mile away in the 1300 block of North Vasco Road. He was arrested without incident.

The motive for the stabbing is unknown. Haskell reportedly suffers from various mental illnesses.

Livermore police spokesman Ryan Sanchez said investigators will submit their report on the incident to the Alameda County District Attorney’s Office on Monday so that prosecutors can decide about filing charges against Haskell.

Anyone with information about the case is encouraged to contact the Livermore Police Department at (925) 371-4777.  Those who wish to remain anonymous may do so.

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