Lucero was stabbed in the chest on Nov. 8, 2008 in Patchogue, N.Y.
Authorities say seven teens went looking for a Latino victim.
Last month, another defendant pleaded guilty to conspiracy and hate crime charges and agreed to testify.
The year since the Lucero slaying has put a national spotlight on the area's race relations. The U.S. Justice Department launched a probe of hate crimes and police response to them.
