Sacramento County sheriff's sergeant. Rod Grassmann said to the station that David Mora (39), was residing in Sacramento County as part of a "some kind of arrangement." Their mother and three daughters lived in another place.
Grassmann described the killings as "unfathomable".
According to the Sacramento County Coroner's Office, Samantha Mora Gutierrez was 10 years old; Samarah Mora Gutierrez was 9; Samia Mora Gutierrez was 13; and Nathaniel Kong was 59.
Officials said that Kong was overseeing Mora's visit to The Church in Sacramento with his daughters, which is a nondenominational Christian church place of worship.
According to court documents, the girls' mother -- Mora's ex-girlfriend -- sought a domestic violence order against him out fear for their safety.
He had been her partner for 15 years. She sought a restraining order in April after she described him as mentally unstable and jealous.
"He threatened me with death if I was caught cheating." ... "He has choked me in my past," the filing stated.
Mora "said he hasn't killed me because he wouldn't know where to take the children," stated the woman, whose identity was withheld due to abuse.
He was also admitted to hospital for a week in April, the woman said.
Mora was also identified in court papers as David Fidel Mora Rojas. He was taken into custody last April 17 for a mental evaluation. A temporary restraining orders was issued nine days later. He was prohibited from possessing ammunition or guns, and investigators were investigating how he acquired the weapon.
May 19th saw the imposition of a five-year restraining or. The order stipulated that Mora could only supervise visits with his daughters for a maximum of four hours per week, with a mutually agreed-upon chaperone. Mora was also required to complete anger management courses.
Authorities have identified Kong as the chaperone at Monday's visitation. According to business records, Kong was an executive at the church. Court records indicate that he served Mora with a May restraining Order.
Mora was taken into custody in Merced County just a few days prior to the murders. After he attacked a California Highway Patrol officer, Mora was arrested on charges of resisting arrest and battery on a officer.
"He was drunk, and while they were arresting them - or trying - he decided he wanted a fight and ended up getting felony charges because he attacked a CHP officer, causing injury," Deputy Daryl Allen, a spokesperson for the Merced County Sheriff's Office told The Sacramento Bee.
Oscar Maldonado was a long-time friend to the family. said that Mora, a hardworking and aggressive man, was struggling with drug abuse and was also mentally ill.
Maldonado stated that Maldonado was "very emotional", like really emotional.
Maldonado believes that it makes sense to his friend. Maldonado stated that Maldonado loved his daughters but that the love was so overwhelming that he couldn't share it. It makes sense in his head. It doesn't make any sense in our minds because we wouldn’t even consider it. But, that was his thought process, I believe.
The Church of Sacramento released a statement saying, "Our church body was devastated and heartbroken at this senseless tragedy. We ask for continued prayers for the victims and their families and for our faith community as they deal with this unexpected loss. Trust the Lord for His strength during our grief."
They attended schools in the Natomas Unified Schools District, northwestern Sacramento. To provide support, counselors and chaplains were present at the schools Tuesday.
The school district released a statement saying that "there are very few words that could give comfort right now for the unspeakable tragedy."
A small memorial was set up outside of the church on Tuesday morning. It included flowers, balloons and stuffed animals. There was also a paper with the words "Prayers to peace, may your souls rest."
Friends and neighbors gathered at the church Tuesday night to remember three girls, CBS Sacramento reports.
Brittney said that while we don't always understand why things happen but that the girls were really, really sweet.
Brittney is a teacher at Bannon Creek Elementary where Samantha and Samarah attended school.
Brittney stated that she cannot imagine the pain mom feels because the staff and community are feeling it. Brittney also said that Aubrey, her daughter, had filmed videos with Samantha dancing last Friday.
Aubrey stated that Aubrey was always trustworthy and could talk to her if she felt upset. "I didn’t believe someone would hurt them, especially their dad."