Twin brother of Austin Metcalf, Texas high football star who was fatally stabbed, claims they never met suspect — and said attack was ‘under 30 seconds’

The twin brother of the 17-year-old high school football star who was stabbed to death at a Texas track meet said the siblings didn’t know the murder suspect, who lashed out violent within moments of a mere seating dispute. “I never met this kid in my life,” said Hunter Metcalf, adding he is still in…