A California teen has been taken into custody after allegedly committing a heinous act, resulting in the death of his parents and a critical injury to his younger sister, as revealed by the Fresno County Sheriff's Office on Friday.

The 14-year-old boy, whose identity remains protected due to legal constraints, now faces two charges of murder and one count of attempted murder for the violent incident that occurred on December 27 at the family's Miramonte residence, according to ABC News.

The Fresno County Sheriff, John Zanoni, conveyed that the juvenile suspect was promptly booked into Juvenile Hall following his arrest.

The shocking turn of events unfolded when the teenager dialed 911 on Wednesday evening, reporting a home intrusion that culminated in the assault of his parents and a subsequent escape by the assailant in a pickup truck.

Upon arriving at the residence, deputies made a grim discovery – the lifeless bodies of the boy's parents, identified as Lue Yang and Se Vang, both 37, and their 11-year-old daughter in critical condition.

The injured girl, suffering from severe injuries, faced uncertain survival during her ambulance transport. Poor weather conditions prevented a medevac option.

However, as of Friday, officials report that she remains hospitalized and is expected to survive.

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California Teen's Fabricated Story and Arrest

The young suspect's initial account of an intruder breaking into their Miramonte home triggered a response from law enforcement.

In a press conference on Friday, Sheriff Zanoni detailed how detectives, after detecting inconsistencies, unraveled the disturbing truth, per CNN.

"Evidence ultimately showed that he had fabricated the story of a break-in and was responsible for using multiple weapons to attack his mom, his dad, and his sister," Zanoni revealed.

Fortunately, the 7-year-old brother of the suspect emerged unharmed during the tragic event and is now under the care of extended family members.

The detained teenager, facing two murder charges and one attempted murder charge, will have his case reviewed by the Fresno County District Attorney's Office.

Law enforcement indicated that, if convicted, the boy would likely be confined to a youth authority and juvenile hall until reaching a certain age, SCRIPPS News reports.

California Murder Remains Under Investigation

Authorities, in their ongoing investigation, are examining the weapons used by the California teen during the assault, The Messenger said.

"Two children have lost their mother and father due to the actions of their other sibling," Sheriff Zanoni said, emphasizing the devastating consequences of the incident.

While it is unclear how the California teen gained access to the weapons, Sheriff Zanoni noted that rural families in the state often keep weapons at home for self-protection.

The authorities did not provide details regarding the exact cause of the victims' deaths or information on the suspect's mental health.

In a noteworthy update, the Sheriff's Office concluded that there are no longer any outstanding suspects in the case, Sierra Sun Times noted.

Consequently, the community is deemed safe, marking an end to the search for a reported silver pickup that fled the scene. However, the investigation into this tragic incident remains active.

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Written by: Bert Hoover

WATCH: 14-year-old arrested for allegedly murdering parents at Fresno County home, sheriff says - From ABC30 Action News