Well if you want to kill someone with an injection you don't worry about wiping them with a alcohol swab before you inject them. I think Perper wants to know if she was in the habit of using the sterlie procedure of using alchol swabs before injecting drugs into herself.
I thought of that too, but maybe if someone is administering the drugs other than ANS, it could be considered a crime, intentionally or not. It would also rule out suicide.
If that person was conscious you would if that's your routine. ANS could have gotten suspicious.
However, wiping them with a alcohol swab before you inject them would make it appear more like an accident than intent to do harm....unless you are fighting them to do it.