The CCTV footage is blurry but graphic. A gunman stands over a cringing victim, firing bullet after bullet into his body until the Phnom Penh street is spattered with blood.
The brazen killing of Cambodian businessman Ung Meng Cheu by an unknown assassin on Nov. 22 shocked the nation. It went viral on Facebook and WhatsApp, prompting Cambodia's usually sluggish police to quickly arrest six suspects.
The footage of the killing showed the burgeoning power of social media in a youthful country where Internet usage has soared in recent years.