PARIS — Police in Nice have questioned a 73-year-old man described as the Bastille Day killer’s “main lover” as investigators described him as a “sex maniac” and “ultra-violent sadist,” according to French reports. The revelation came amid revelations that Mohamed Lahouaiej Bouhlel had displayed a “clear, recent interest in the radical jihadist movement,” growing a beard only in the last eight days after a previous life drinking alcohol and eating pork. Francois Molins, the French prosecutor, said the Tunisian, who killed 84 people when he plowed into crowds on Nice’s Promenade des Anglais last Thursday, had searched on the Internet...