A Tracy woman has pleaded guilty to illegal firearms trafficking, the U.S. Attorney’s Office for the Eastern District of California announced. Alejandra Susana Castillo, 34, admitted Friday to working with a co-conspirator to traffic firearms between Aug. 22, 2023 and Aug. 27, 2024. Castillo and the co-conspirator, whose name was not released, purchased the firearms in Nevada and sold them on the black market in California, Acting U.S. Attorney Michele Beckwith said. In July, Castillo’s co-conspirator led a law enforcement officer on a high-speed chase at speeds over 100 mph, federal prosecutors said. The pursuit was called off due…..