Illegal???

I did not know which board to post this to. I am going to try to make main info obvious in case this person is registered on here....

I recently became aware of an RN in an out of state hopsital, but lives in the same state as I do, Who administered an IV to own relative after having had the flu, in relative's home. The relative said,"he/she needed to be replinished."
I am guessing the relative was a little dehydrated from having dry heaves. I would have assumed that the relative would have drank fluids and if it was that bad he/she should have gone to the doctor/hospital.
I have previously heard concerning comments from RN bragging about "forgetting" (stealing) discard used viles with leftover meds and even pain pills taken put into pocket and leaving the workplace with them and not returning them or disgarding them. I have also witnessed this RN making comments about wanting prescribed meds after a relative died and then harping b/c the hopsice RN was able to properly disgard the meds first and RN saying "Hospice RN got the good stuff before I did."
RN, I think is diagnosing, self-medicating, and practicing medicine outside of workplace.
I am trying to understand how RN got an IV to begin with and then able to administer/treat relative at home when RN is only a licensed ER RN at hospital.
RN has even offered me nausea meds, offered my boyfriend pain meds that RN has gotten hands on. RN also has medicated family and friends with meds RN has from hospital. RN has and tried diagnosing family and friends. RN has been in work for 7 years now and works in a major hospital in the ER.
I am not an RN, yet. But I do feel deep down what RN is doing is illegal, dangerous, and unethical.
Any thoughts?