After Damian Herrera, 21, gunned down his mother, stepfather and brother, police say, he carjacked and killed a driver before chaos erupted hours later at a general store in a tiny town that artist Georgia O'Keeffe called home for most of her life. That's where the final victim died.
Herrera was arrested on Thursday and booked into jail on suspicion of five counts of murder.
The shooting of his family appears to stem from a domestic dispute, police say, but investigators were still piecing together what happened at five different locations with many witnesses.
District Attorney Marco Serna called the shootings horrific and senseless, saying northern New Mexico was rocked to its core. He said his office will request that Herrera be held without bond.
Herrera had no criminal record, only traffic citations in 2015 and one earlier this year, according to court records.