General Motors Co should pay for concealing an ignition switch defect from its customers that has been linked to nearly 400 injuries and deaths, a lawyer for an Oklahoma man injured in a car crash told a Manhattan jury on Tuesday. “This case is not just about an accident that occurred in Oklahoma in 2014,” said Robert Hilliard, who is representing plaintiff Robert Scheuer. Key GM employees knew about the problem for more than 10 years, said Hilliard, adding that evidence would show the automaker’s “cover-up” of a dangerous safety flaw.