Info as to what medication was there and that she was put into the shower would be known by him. IF the media report is stating that this info came from the investigators report and only that report or there is a copy of the report in the media then I retract my opinion.
From what I know, he hasn't talked about the floor to shower thing. This was from the coroner's report --- which may have been leaked to the media.
What also bothers me is the following quote (from TMZ):
"A check of the nightstands revealed large amounts of prescription medication in the decedent's name. Also noted were numerous empty prescription medication bottles in the decedent's husband's name, the decedent's mother's name and unidentified third party names."
If she only took meds during "that time of the month" - why so many bottles on the nightstand. I have 1 drug that is always on my nightstand. My insulin. When I had surgery, I had my prescription meds on my nightstand. Other than that, I don't think the every-day-non-drug-abuser needs to keep any drugs on their nightstand....unless they use it on a daily basis.
What's worse is EMPTY bottles. Don't you throw them away. My mind has this vision of a pill bottle filled bedroom

Of course, that's just my opinion.
Mel