When to Kill a Play for an Apparent Injury

[bainsey]

A-1 goes down on an apparent non-serious injury (no head contact, etc.). Typically, if Team A is in control, I kill the play, but if Team B is in control, I prefer to hold my whistle and let it play out.

Had one today that was different: I'm the T. A-1 and B-2 both went down above the three-point line. My instinct told me to hold my whistle, as A-3 was driving the lane. The L wound up calling a common foul against B-4 a few seconds later, and I immediately beckoned both coaches.

While nothing major came out of this, thankfully, I'm wondering whether I should have killed the play immediately, as both teams were involved. While you can say this is a HTBT, does anyone have any general rules for double-injury?