Kou Voravong
The attack occurred at approximately 22:15, at Phoui Sananikone's, an official residence nearby the Voravong family's. The attackers launched three grenades by one of the windows on the ground floor, in the dining room. They fired three or four pistol shots and then run away. Kou voravong, sitting with his back to the window, was directly hit by a bullet which came in by the kidney and out through the navel, after cutting the vena cava and crossed the liver and intestines. His dead is declared shortly after admission to hospital. A dozen people were injured by the explosion of the grenades, slightly for most of them.
Kou Voravong
If there was no doubt about the identity of the one who pulled the trigger, various theories about the person who was behind the crime were advanced by some people, depending on their political, ideological or family affiliations. They were mainly three:This case of "Attack on State Security" involved many influential political figures. Lots of questions remained unanswered and the protagonists were never troubled. In March 1955, all defendants were granted conditional release by order of the new prime minister – Katay Don Sasorith (ກະຕ່າຍ ໂດນ ສະໂສລິດ) – who also had authority on Interior and Justice. He did not want under any circumstances to open a trial where his name could be mentioned, as well as accusations against his political friends.