YORBA LINDA (CBSLA.com) — Authorities Sunday continued to investigate the circumstances surrounding a deadly shooting inside a home in an upscale neighborhood in northeastern Orange County.

Investigators say they received a call about 3:15 a.m. from a female homeowner of a disturbance at a home in the 5100 block of Wendover Road in Yorba Linda.

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“The female informant stated that her husband had a male subject at gunpoint,” said Lt. Jeff Hallock of the Orange County Sheriff’s Department.

Upon arriving on scene, deputies found 22-year-old Fullerton resident Paul Michael Bracamontes dead from a gunshot wound.

“The subsequent investigation revealed that the adult male and female homeowners were awakened to the sound of Bracamontes yelling and screaming in the backyard of the residence,” Lt. Hallock said.

Bracamontes then threatened the couple, broke a rear sliding glass door and entered the home, officials said.

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The suspect was shot after making entry into the home.

“Both the male and female homeowners have indicated they did not know Bracamontes and had never seen him before,” said Lt. Hallock.

The homeowners were questioned and released by authorities.

Bracamontes’ relatives later told police that he was hallucinating at a party earlier in the night and was heard making several inappropriate comments regarding “zombies” and wanting a gun.

It was unclear if he was under the influence of drugs or alcohol at the time of his death.

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Anyone with additional information is asked to call the Orange County Sheriff’s Department at (714) 647-7000.