(CBS/AP) ALBUQUERQUE, N.M. - A 15-year-old New Mexico teen is accused of shooting his parents and three younger siblings to death over the weekend.
Investigators trying to piece together what led to the violence late Saturday night found several guns believed to have been used in the shootings, including one assault rifle, Bernalillo County Sheriff Dan Houston said Sunday. The owner of the weapons has not been determined.
"There's no other way to say it, except that we have a horrific crime scene down there that we are working on," said Houston.
Nehemiah Griego, 15, was arrested following the shootings at the residence in a rural area southwest of downtown Albuquerque, the sheriff's department said. He was charged with two counts of murder and three counts of child abuse resulting in death.
Authorities identified the victims as Greg Griego, 51, his wife Sara Griego, 40, and three of their children: a 9-year-old boy, Zephania Griego, and daughters Jael Griego, 5, and Angelina Griego, 2.
Greg Griego was a spiritual leader known for his work with firefighters and the 13 years he spent as a volunteer chaplain at the county jail.
"Chaplain Griego was a dedicated professional that passionately served his fellow man and the firefighters of this community," Fire Chief James Breen said in a statement. "His calming spirit and gentle nature will be greatly missed."
Griego also was a former member of the pastoral staff at Calvary, a Christian church in Albuquerque. As part of his work there, he oversaw the Straight Street program for jail inmates.
Authorities declined to release details of any conversation that the 15-year-old had with investigators, but they said he was the Griegos' son. The sheriff's office said he is charged with two counts of murder and three counts of child abuse resulting in death.
Sources told CBS affiliate KRQE that Nehemiah Griego was homeschooled, and the Albuquerque public school system confirmed that the 15-year old was not registered with the school district.
The station also found an online dating profile for Nehemiah Griego in which he describes himself as "a fun loving guy who [likes] to make [people] happy."
The sheriff's office said it wouldn't release any further information about the case until Sheriff Dan Houston holds a news conference Tuesday morning.