Human Rights Watch called on Lebanon Tuesday to release a son of Libya’s former dictator Muammar Gaddafi, saying he had been held on “spurious charges” for eight years. Lebanon in 2015 arrested and accused Hannibal Gaddafi, known for living the high life, of withholding information about the disappearance of Lebanese Shia cleric Imam Mussa Sadr in 1978. But HRW said he was only two years old at the time the cleric disappeared, and accused Lebanon of subjecting him to an “apparent arbitrary detention on spurious charges”. “Spending eight years in pre-trial detention makes a mockery of Lebanon’s…