Need some help with a weird roughing the passer call.

[Willnichols]

If someone can provide the actual rule for roughing the passer including the option of a change of possession I would appreciate it.

Here is the scenario in a game that happened last night:

A qb passes the ball downfield beyond the neutral zone and and it is a completed pass with extra yardage gained. B player tackles A reciever and ball comes out and a B player recoveres the fumble. HOWEVER on the pass there was a roughing the passer penalty.

Here is what happened at one of our games last night.

The officials calling the game ruled that the rtp should be tacked on from where the ball was fumbled by team A. Shouldn't the ball have returned to the previous spot (LOS) and the penalty been assessed from that point with the automatic first down?

now according to the following article:
Roughing the Passer
Rogers Redding
November 6th, 2000

http://football.officiating.com/x/article/1400

By definition (2-27-5), the passer is the player who throws a legal forward pass. He is the passer from the time the ball is thrown until it is no longer a pass, or until he moves to participate in the play.

The enforcement spot for the penalty, which is 15 yards and an automatic first down, varies depending on the result of the play. If the pass is complete and Team A retains possession until the ball becomes dead, then the penalty is tacked on to the end of the last run if that is beyond the neutral zone. But if the pass is incomplete, if possession changes during the down, or if the last run ends behind the neutral zone, the penalty is marked off from the previous spot.