You don't need a legal expert, all you need is to go to your BON website and see what reasons the BON are sanctioning licenses. In the example you gave, you don't need to go into that much detail b/c if you have a critical lab just check to make sure the lab documented they called you, if they did, that is part of the patient's chart and you don't need to chart it again. But you do need to chart (you don't need a time if it is a couple of minutes of when the event occurred as the charting will capture the time) that you contacted Dr. Smith and you need to chart any follow-up.
When I worked the floor, I had managers and co-workers that didn't like my charting b/c they said I wrote too much. That is the one thing hospitals don't have control over--your charting. You chart what you feel like you need to chart, but you don't have to double chart. If it is documented elsewhere you don't need to chart it again. I once had a stupid manager that wanted us to triple chart a few things and I absolutely refused.
You should never fear being pulled into court if you have documented what you are supposed to. I have been called into court more than once (nothing I personally did, just giving my personal account for things) and it never bothered me. The nurse that needs to be fearful is the one that charted hardly anything at all.
If you didn't chart it, it didn't happen. Period.