3 suspects, including teen girl, in custody in Fullerton triple-murder case: Police
Frank Felix, left, and Josh Acosta are shown in a booking photo released Sept. 25, 2016, by the Fullerton Police Department.

via KTLA:

FULLERTON, Calif. -- (KTLA) -- Two men and a 17-year-old girl were taken into custody Sunday in connection with three people found murdered in a Fullerton home, police said.

Police also identified the victims as Christopher Yost, 34; Jennifer Goodwill Yost, 39; and Arthur William Boucher, 28. The three were discovered dead in their home on the 400 block of South Gilbert Street after police received a call from a child saying her parents had "died" around 8:21 a.m. Saturday.

At 8:45 a.m. Sunday, officers arrested two males in connection with the three murders, according to Fullerton Police Sgt. Jon Radus: 21-year-old Josh Acosta of Fort Irwin and 25-year-old Frank Felix of Sun Valley. The men face murder charges and were in the process of being booked into Fullerton City Jail, he said.

On Sunday investigators also located unharmed the teen who was missing Saturday, Kaitlynn Goodwill Yost, 17. A 17-year-old girl was also detained, Radus said, but state law prevents officers from disclosing the identity of juveniles placed into police custody.

The teen also faces murder charges. All suspects knew the family, officers said.

Jennifer Goodwill Yost was Kaitlynn's mother and she looked upon Christopher Yost as a stepfather, according to Radus. Boucher was a family friend who stayed at the residence from time to time, he said.

Radus said the suspects also know Kaitlynn, but their relationship is under investigation.

Two other children, ages 6 and 9, were also found in the home unharmed Saturday morning. They have been provided counseling services and are with relatives, according to Radus.

The motive was still unclear at this stage in the investigation, police said, and officers have not yet disclosed how the victims died.

The investigation is currently ongoing. Anyone with information is asked to call Detective Coffman at (714) 738-5361 or Sgt. Rowe at (714) 738-6776.

FULL STORY: 3 suspects, including teen girl, in custody in Fullerton triple-murder case: Police - KTLA