Tonga royal family denies allegation late king covered up murder of Australian horse trainer

Statement comes after allegations king helped George Brown's killers return to Tonga

Tonga's royal family has denied an allegation that the late King Taufa'ahau Tupou IV was involved in covering up the murder of Australian horse trainer George Brown almost four decades ago.

Brown's incinerated body was found in a burnt out car in bushland near Sydney in 1984.