The Crown opening also stated that DM ordered a new mattress from Sleep Country, and needed it immediately. When the store couldn't arrange delivery within the timeframe DM requested, DM used a 3rd party delivery service to get the mattress there asap. What wasn't clear was whether this mattress was for Maplegate.
This infers to me that whatever happened, happened in bed
I cannot recall if the opening statements addressed the Crowns suspected cause of death?