Drunk ??. what does that mean? If the doctor had slurred speech, was acting and speaking in an incoherent manner and staggering,then yes her colleagues would have complained and she would have been suspended for further investigation. Unfortunately alcoholics are more subtle than that and can hide their addiction from their colleagues and even from their families, it is often difficult to pick up.
What references were checked and how thoroughly I have ni idea.
This unfortunate patient died because a breathing tube was placed down the wrong passage and was starved of oxygen before it was recognised and the subsequent treatment was inadequate. Would that of happened in a sober doctor? It might and it has done in the past and will do again in the future.
My sympathis are with all involved including the anaesthetist.