Authorities were searching Monday for a man who witnesses said shot and killed an Illinois tourist who was asking for directions. After dropping his son off at a shopping mall, Ronald Gentile, 54, pulled over in the Coconut Grove area Saturday afternoon, police said. Witnesses reported seeing Gentile roll down the window on his rented white Chevrolet Cobalt. A man dressed in black then apparently approached the vehicle, robbed and shot Gentile.