Which whistle takes precedence?

[dave30]

I am the trail, the ball is swung down into the corner opposite me. At the same time, my partner and I blow the whistle. I have an off-ball foul against the offense for hooking a defender and throwing him out of the lane. At the same time, my partner has a shooting foul against the defense. We talked about it and decided the offensive foul happened first. That's what we told the coaches anyway. In actuality, the whistles were simultaneous. I really don't know which foul occurred first.