Det. Brian Meux, of the Sacramento County Sheriff's Department, said Donald Ortez-Lucero, 27, was booked into Alameda County Jail on two counts of murder in the Aquitania homicides in South Sacramento.
Ortez-Lucero, who was arrested without incident around 9 a.m. today in Oakland, is not one of two men suspected of shooting Aquitania or the baby, but is alleged to have been a participant in the home-invasion robbery and was waiting outside when the Aquitania was killed.
Meux said he was unsure when the suspect will be transferred to Sacramento County Jail, but he is expected to be arraigned later this week or early next week.
Until now, no suspects have been arrested in the September 2007 killing of 21-year-old Sean Aquitania and his infant son, Sean Jr. Sacramento County sheriff's deputies have long speculated that Aquitania and his son interrupted a robbery gone bad. Authorities had not been able to identify any suspects until today.
News of the arrest was made public at a press conference this afternoon.
Father and son were shot and killed at a house on Country Greens Court in southeast Sacramento County.
Aquitania, 21, was killed during a struggle inside the house. The baby, still buckled in his car seat, was shot in the head as the two robbers fled.
"America's Most Wanted" aired episodes about the Aquitania case.
The first suspect (two sketches at left) was described as a light-skinned, possibly Hispanic male. He was approximately 5'9" tall, and weighed between 180 and 200 pounds. He wore an Oakland A's baseball cap and jersey and had a thin mustache.
The other suspect (no sketches) has been described as a dark-skinned, possibly African-American male with a round face and stocky build. He wore a hooded sweatshirt and had a bandana or some other covering over his face. Investigators believe he may have sustained an injury (possibly a gunshot wound) to his lower body and may have sought treatment after the incident.
PHOTO CAPTIONS: Top, Bee file photos of 21 year-old Sean Aquitania and his 8-month old son, Sean Aquitania, Jr.
Middle, Sacramento County Sheriff's Dept. photo of 27 year-old Donald Ortez-Lucero, who was arrested in Oakland in connection with the Aquitania slayings.
Below, suspect composite sketches from Sacramento County Sheriff's Dept.