Twenty years after Thailand’s "Tak Bai massacre", relatives of the 78 victims express anger and grief at the fact that the killers will never be brought to justice. On Friday the 20-year statute of limitations expires, and murder charges against seven suspects will be dropped. "It’s completely unforgivable," says Parida Tohle, whose son was killed in the October 2004 tragedy, one of the bloodiest days in the long-running conflict in southern Thailand between government forces and separatist insurgents. IMAGES AND SOUNDBITES