An Oakwood man was arrested Friday in a cold case investigation of a 2006 murder in Lawrenceville, Gwinnett police announced.

Joseph Diaz, 20, was charged with murder in the October 2006 shooting death of 20-year-old Lal Ko, Gwinnett Police Lt. Illana Spellman said. He was arrested at the Hall County Jail.

Another suspect in the murder, identified as 24-year-old Victor Pastor-Flores, remains at large, police said.
The two suspects knew the victim and apparently shot him in the 400 block of Bethesda Park Trail in Lawrenceville during an argument, Spellman said.

“The exact circumstances and motive surrounding this incident are still under investigation,” Spellman said.
Diaz was arrested by Gwinnett police investigators at the Hall County jail Friday morning after he posted bond on a charge of giving false information.

Hall County Sheriff’s Col. Jeff Strickland said Diaz had been a person of interest in a January 2008 shooting in Hall County and was charged locally as a result of questioning in that case. Hall County and Gwinnett County authorities coordinated his arrest on murder charges at the jail.

Diaz remains in the Gwinnett County Detention Center. Police continue to look for Pastor-Flores, whose last known address is unknown, Spellman said.