In that case there was no fever, no flu-like symptoms and the ice was just for partying. And later when the original plan fell apart, the fever, flu, icebath story was crafted. Maybe so.
And i'll add to this if a quick acting undetectable poison was used, he sat there with her dead for awhile. Because she had those "postmortem stains" and rigor mortis. Now that's one sick ba#turd.
The same thing for Anna. No one shook her?? Brigitte just looked and said it looks like she stopped breathing to Taz??