Running Lane Play

[Andy]

Just want some opinions on whether or not this was handled correctly.

HS game, I'm the BU. No runners on base, batter lays down a bunt. Catcher pops out from behind the plate, fields the ball, and throws to first base. The throw is low and hits the runner in the foot as she is running to first base. She is still about three to four strides from first. I have no doubt that the thrown ball hit the runner. Runner turns at first and goes to second. After the play is complete, it dawns on me that we may have a running lane violation. I go to my partner and ask if the runner was in the lane when the ball hit her, he replies that she ran the entire way from home to first inside the foul line and out of the running lane. We declare the runner out for interference.

My question is whether it was proper for me to go to my partner and ask about the running lane violation when he did not make the call initially?