A mere bruise on a child may signify - almost anything! And even fairly regular bruises (given certain maladies of children) - ditto.
But the appearance: excites all visceral imaginations and also - all ideas of 'justice' + whatever we want to call the 'save the Cheeldrun' at All Cost, mindset.
No wonder that, despite the perspicuity of the IWETHEY solons: there IS no 'answer' of universal application. The defects in ourselves + our systems guarantee that - always this area shall produce more or fewer outrages in both directions
{sigh}
ie dangerous.. to have children who get bruised via Whatever!
A.