A woman and her four children were stabbed to death Saturday night in Brooklyn, and police arrested a 25-year-old mentally ill relative for the brutal crime. The suspect, who neighbors said lived at home, was reportedly found at the scene soaked in blood and arrested with his feet bare. Police seized a machete and scissors from the scene as evidence, sources told the Post. The children were all under the age of 10, with the youngest being an 18-month-old boy. The toddler and two girls—ages nine and six—were dead upon the police’s arrival, and the 37-year-old mother and her eight-year-old son were later pronounced dead at the hospital.