TUSCALOOSA, Ala.—Someone in a vehicle pulled up to a home in Tuscaloosa, Alabama, and opened fire with a rifle, leaving a man and a 2-year-old child dead, authorities said Monday. Police were searching for three people who may have been present at the killing of Marcus Winston, 25, and the youngster on Sunday afternoon, said Capt. Jack Kennedy of the Tuscaloosa County Sheriff’s Office. But no charges were filed and the three may or may not be suspects, he told a news conference. Authorities did not release a possible motive or the name of the child, who Kennedy said wasn’t related to Winston. They said at least one rifle was used in the shooting. Earlier, in a statement shared on social media, Mayor Walt Maddox referred to unnamed suspects in the shooting and said they “are not new” to Tuscaloosa police. “The fact that the suspects are known speaks to …