intentional slap

[Baseman611]

Had a play that still eats at me. In a drive that orginated in the Trails Ares ( mind you this is three man Varsity Boys) I was in the Lead position. I was in between a wide angle and a close down posotion refereeeing the defense in my primary when the dirve came into my secondary. As the shot was released it kissed off the glass and was on its way down. I stuk with the play when from behind a kid came and slapped it off the backboard after it was kissed off the glas ABOVE the rim and on its way down. High School mechanics state the off officials picks up the shot angle. Given this situation, i sat on my whistle and waited for my partners to make the call. It did not happen so I reluctantly took matters into my own hands and called it.

What should have been done?
Was it a goaltend?

This is eating me up inside...