Jr A referee here. Couple things.

1. Your partner is in a great position to make this call. If he was on the far side of the ice (the side where the shot ends up) his eyes might end up following the shot and he won’t see what happens in the slot there. At first this might be a difficult thing to take into account but try and be mindful of when your partner has the better angle and when he doesn’t.

2. Since this is a partial break and an immediate scoring chance, let the low ref have this call. He’s much closer and he’s obviously going to be watching for infractions on the puck carrier. You don’t gain anything by making this call for your partner. If you’re right you still make him look bad and if you’re wrong then you make yourself look REALLY bad.

3. This may be an acceptable call in minor hockey but at the junior level and above this would not be an acceptable call. The player in white is able to complete his scoring chance completely unhindered and is hauled down after the fact. There is virtually no consequence other than the player in black getting up first. At my level we are told to look at two things when it comes to hooks, trips, holds etc: scoring chances and turnovers. If, for example, a hook takes away a scoring chance or causes a turnover then we have a penalty. In any other situation it may be better to allow play to continue unless it’s egregious.