Froylan Chiprez, 38, was found guilty on Dec. 10 of four counts of murder and two counts of attempted murder. Jurors also found the special circumstances for an intentional killing while being active in a street gang at the time of the crime to be true.
Chiprez filed his request Thursday at the San Bernardino Superior Court, the day he was scheduled to be sentenced.
The district attorney objected the continuance, according to court records.
Chiprez is due back in court on Monday for a confirmation of counsel hearing.
On July 9, 2000, Chiprez was part of a crew who went to a residence on Vine Street in San Bernardino and opened fire on two presidents of local street gangs. Their motive was to remove the high-ranking officials from their positions of power, prompting some law enforcement circles to dub the case "Dead Presidents," officials said.
After the shooting, the suspects fled the scene. Authorities arrested Chiprez on June 21, 2011, in Tijuana and he was extradited to the U.S. six months later.
Chiprez is facing life without the possibility of parole.