Articles mentioning that Ethan was found on the floor:
Sources in Moscow, Idaho, say the house where four students were brutally murdered Sunday was the worst they have ever seen. There was so much blood that it oozed through the walls.
www.dailymail.co.uk
^This one is daily mail, but it appears to be a copy of an article published elsewhere. It's the first mention on our media thread (it's on page 2) of Ethan being on the floor. Next the coroner will say the same thing.
Later, the coroner will clarify that all four were "in bed": (page 8 of our media thread):
While speaking to NewsNation, Latah County Coroner Cathy Mabbutt said the four victims of Sunday night's quadruple homicide were found in bed at an off-campus residence near the University of Idaho
people.com
Meanwhile, other sources picked up the DM original story.
So, that's how I was misled into thinking that Ethan was found on the floor - that and the alleged blood stains dripping from that room onto the foundation (it is hard to believe that much blood would be left over after soaking into the mattress...)