Thanks guys, so much.
Ok, here's the scenario:
Killer (K) has planned for some time to murder Victim (V). K is an ice sculptor with a devilish streak (obviously!). What he does is punch the V in the eye hard enough to knock him down and stun him for a moment. Then he quickly plops his body into a pre-made ice coffin. V suffocates. He takes the coffin to the nearby lake and pushes it out into the middle. This happens Friday night.
The body is found Sunday morning, floating. No ice obviously. What I'd like to be able to say also is: no obvious cause of death, and that the night in an ice coffin throws off the ME by 24 hours. (I am partly assisted in this because the cops have assumed, and therefore told the ME, that V was killed Sat night.)
Thoughts? Does knowing what I am trying to do make any difference to anything said so far?
Thanks again!
1.) If my memory still works, more or less, well ... There was a killer known as The Ice Man. (NY/NE area, if I recall correctly.)
He got that name because one of his victims got found by the authorities "early." He would kill his victims, usually for money, and stick them in a freezer for some time, like months or more. Then he would take the body out of the freezer and dump it in a lake or river or something watery. The authorities "always" estimated wrongly on the time of death. (But then they got the bodies more than a few days after they were dumped, so this anecdote might not be that helpful.)
Well, back to that one victim that got recovered early. The authorities (the coroner) thought the lack of sufficient decomposition as being suspicious. So they investigated a bit more thoroughly ... and eventually figured out it was done by the guy who ended up being known as The Ice Man.
In your case, the internal core temperature of your dead body might still be too low and cause suspicion. But I'm guessing ...
I'd suggest that your bad guy do what The Ice Man did, store the body for a couple of months in the freezer, and then dump the body in water.
2.) In your scenario, I think the body will be on the bottom of the lake on Sunday morning (not floating). Wet clothes tend to drown a person (that's what it was doing to me, when I was a young fella). It takes some time for the gases caused by decomposition to accumulate and cause the body to float.
imo.