Cops are hunting for the gunman they believe allegedly fired the stray bullet that killed a 24-year-old mother outside a Brooklyn housing development. Corey Brown, 21, allegedly opened fire in the courtyard of the Lafayette Gardens houses when an errant shot hit Nicoleia Taylor in the chest about 11:30 a.m. on Tuesday, sources said. -snip- “She was a hard-working mother who just got caught in crossfire from some hooligans who need to get a life,” said her sister, Sheohnna. “It was a (expletive) who didn’t know how to shoot, who didn’t get his aim right.”