[SoftballMominVA]

I remember seeing a study about infant deaths that occurred in a co-sleeping arrangement about 5 or so years ago. Nearly 100% of deaths occurred with either someone under the influence of drugs or alcohol or on occasion, someone very overweight (not just pudgy, but in the morbid category). In both cases the adult was not able to feel the infant under them. I don’t have a link as it was in a book which is at school (and I’m at home) but it has a ring of truth to it.

[AnAmericanMother]

I seem to recall reading that study too, and IIRC the conclusions were as you describe.

I would say the reasonable conclusion is that IF you are morbidly obese or an alcohol/drug abuser, it's probably not a good idea to put the baby in the bed with you.

There was a criminal case here a year or two ago involving a very large and very drunk woman who smothered her baby by rolling over on her while drunk. They charged her with manslaughter, and I believe her conviction was upheld on appeal.