PHNOM Penh authorities met with the Federal  Bureau of Investigation Wednesday to discuss cooperation on investigating the July 11 dual slaying of journalist Khim Sambo and his son Khat Sarinpheata, 21.

After two assassins gunned down the father and son outside Olympic Stadium during the run-up to elections, the government came under widespread criticism for yet again allowing a climate of fear to taint the political environment.

Municipal Police Chief Touch Naruth said Thursday that police provided the FBI with their investigation report.

"We have a sketch of the suspect, but we need time to verify his identification," Touch Naruth said. "We cooperated with the FBI and expect they will provide technical assistance."

Also Thursday, the Cambodian Center for Human Rights issued a statement insisting "authorities arrest the real responsible killers and not innocent people like Born Samnang and Sok Sam Oeun in the murder of Chea Vichea."