I've never quite figured out exactly when everything that happens MUST be someone else's fault.
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>Oh, don't get me wrong, I well understand why the cop was there. But in the grieving parents' POV she was surplus to requirements. It was the authorities' volition that the cop be there, not the parents. When you call 911 for an accident like this, and they say "Which service do you require?", you don't say "... oh, and better send a cop too just in case we purposely tried to drown our child". IOW she was not invited so, if you set foot in someone's house unbidden, and slip, then that's down to you IMO.
"You don't manage people. You manage things - people you lead" Adm. Grace Hopper
Pflugerville, between a Rock and a Weird Place