Who lit the fire that claimed the lives of U.S. Ambassador J. Christopher Stevens and another American at the U.S. diplomatic mission here just over a year ago? Who launched the mortar rounds that killed two CIA contractors that same night? Or, for that matter, who bears responsibility for the 2011 torture and killing of Abdul Fattah Younis, the Gaddafi-era military commander who defected to lead the rebels? “Do you live on Mars?” asked Hashem Bishr, the hard-line Salafist leader of a powerful Tripoli militia. To understand Libya’s unsolved murder mysteries, understand this, Bishr said: “It’s just not a good time.” What he meant is that there are people who know the answers — they’re just not willing to share. Nor is the fragile, post-revolution government prepared to mete out justice, many Libyans and rights groups say. Tripoli’s weak authorities have promised to investigate the killings. “But until now, there […]