BUENOS AIRES, July 31 (Reuters) - Colombia striker Teofilo Gutierrez, who pulled a gun on team mates when he was at Racing Club, is back in Argentina as River Plate's big hope for the new season, which that kicks off on the weekend. Gutierrez forced his way out of Mexico's Cruz Azul to fulfil his dream to play for River as soon as coach Ramon Diaz showed an interest in bringing the striker back to Buenos Aires. ... More...