ALBUQUERQUE, New Mexico – The 15-year-old boy charged with gunning down his parents and three siblings in the family's home Saturday night was a quiet loner who walked around his Albuquerque neighborhood in camouflage military fatigues and did not attend the local school, say neighbors stunned at the teen's murderous rampage.

Nehemiah Griego has been charged with two counts of murder and three counts of child abuse resulting in death. Police say he killed his parents, Greg and Sara Griego and three of their children with an assault rifle. The suspected gunman is being held at the Bernalillo County Juvenile Detention Center as police and local residents try to make sense of the horrific crime. While police declined to discuss the boy's motives, area residents said he was a loner.

"From what I hear neighbors were kinda scared of the kid," South Valley activist Tony Padilla told local news station KOB Channel 4.

Area residents said the teen was almost always seen by himself and wore military-style clothing. Griego was not registered as a student with the Albuquerque Public School District, but police could not confirm if he had dropped out or was being home-schooled. Griego appears in an online dating site called http://www.meetone.com wearing military fatigues with the comment: "I'm a fun-loving guy who [likes] to make [people] happy; I might be shy but I'll open up once you get to know me." The site does not correctly list his age.