Pass Interference on an Illegal Forward Pass

[JRutledge]

So you say that you cannot have a DPI on an illegal forward pass. But what if that determination is based on why the pass might initially is called intentional grounding in the first place?

For example, if the QB threw the ball to a spot and his receiver is held up because he was being mugged on a crossing route. The Referee just sees the ball thrown to an empty spot and throws the flag. The back judge sees the receiver being held while the ball is in the air. Are we going to pick up one of those flags? I understand that technically this would be an illegal forward pass, but why do we possibly have an illegal forward pass? We probably have it because the defense committed an illegal act as well. This is not the same in my mind as a pass beyond the LOS.

Peace