The son of Lebanon’s slain former premier Rafik al-Hariri vowed he would not rest until the killers are punished after a U.N.-backed court on Tuesday convicted a member of Hezbollah of involvement in the 2005 assassination.

“(For) the first time in Lebanon’s history of many political assassinations, the Lebanese find out the truth,” Saad Hariri, also a former premier,  said.

Some Lebanese, including victims of the attack who waited 15 years for a verdict, voiced disbelief at the acquittal of three other Hezbollah members. The tribunal also said it found no evidence of involvement by Shi’ite Hezbollah’s leadership or by Damascus.

KAN's Mark Weiss spoke with Assaf Orion, a senior research fellow at Tel Aviv university's Institute for National Security Studies , about to the findings of the UN tribunal.