What do you have?

[RSturgell]

13U game this summer played under high school rules. On a play at the plate. A throw comes from left center field which pulls the catcher up the 3rd base line roughly 10-15 feet. The runner and ball get to the same spot about the same time. The catcher tries to catch the ball and swipe tag the runner. As the runner is trying to get by the catcher the runner holds up his left arm to me it looked liked to duck the tag or avoid getting hit by the ball. The ball is jarred loose and the runner scored. 1st the defensive coach said the runner had to slide (he was to far away from the plate to attempt a slide), 2nd the defensive coach said the runner threw an elbow at the catcher. I did not see it that way and went and spoke to the base umpire. He did not see an elbow "thrown" either. We let the play stand with the runner scoring. Is there anything different that could have been done? Thanks