While a legal pass is in flight beyond the neutral zone to a receiver on the left side of the field, a DB blocks an eligible receiver on the right side of the field 30 yds away. Is there a violation? (Hint: this is HS football).
Dan, you are on the right track. It is pass interference. In HS FB, there is no such thing as an uncatchable ball, so it is 15 yds from the previous spot and first down.