Davis Justin Jurado and his stepfather, David Archer, were shot near a neighborhood park during a drug deal turned robbery, according to police.
Jurado died from his injuries. Archer's injuries were not life-threatening.
U.S. marshals took Moering into custody during a traffic stop in Phoenix last week. He had a one-way Greyhound bus ticket to Las Vegas and police said it appeared he was attempting to flee Arizona at the time of his arrest.
Police said Moering is the prime suspect in the homicide.
Both suspects face a first-degree murder charge. They each are being held at the Maricopa County Sheriff's Office jail on $1 million bond.