I'm just wondering...
You have a family of 5 that has been murdered and there is no sign of forced entry so the family probably knew the perp. Also there are no signs of a homicide/suicide. Would it be a waste of time to dust for fingerprints in the bathroom, toilet seat/flush handle and the faucet handles considering there are 5 people that regularly use these items? I mean it would be possible that the perp. washed their hands or went to the bathroom sometime while in the house right? Also, should you try to get fingerprints off frequently used items by members of the family throughout the home or would that be a waste of time also? Just something I was thinking about while studying my Forensis Science textbook.