[Happy Monkey]

Depends on when the window was actually broken. If it was already broken before the additional cops came on the scene, then she may have hit him in a struggle. If after, then he may well have "walked into a door". It's also possible that he is as profoundly stupid as the given explanation, but that would also require that the other two also be that stupid, and for there to be an innocent reason for them to be well outside the assigned patrol area with a non-service weapon.