OJ Simpson’s former sports agent says the acquitted double-murder suspect confessed to his ex-wife’s murder while high on a cocktail of drugs and drink. The NFL running back-turned actor, who died on April 10 aged 76 from prostate cancer, avoided jail in 1995 when he was cleared in criminal court of the slaughter of his former partner Nicole Brown Simpson, 35, and her 25-year-old waiter friend Ron Goldman the previous year – but was found liable of their deaths in a civil case brought by the tragic pair’s families in 1997, in which he was also ordered to pay $33.5 million in compensation. Simp…