Interception BIB Fumble Fumble Fumble

[agr8zebra]

1. Blue has the ball on the 50 yd line during a 3rd-down pass play the ball is intercepted by white.
2. During the return of the interception by white, White #50 commits a Block in the Back(BiB)
3. Later in the play, the ball is fumbled by white and recovered by blue who advances the ball,
4. Blue then fumbles the ball while being tackled and the ball is recovered by white and the ball is dead at whites 30YdLine.

What do you do with the BiB?

What we did is, White ball at the 30yd, acknowledged the penalty but no yardage, as if the penalty was declined by Blue to retain the ball following their recovering the fumble following the interception.

Did we do it right?*