The cockroach which was dead in my bathroom for 2 days and most assuredly was there when I went to the bathroom at 2am last night was gone this morning when I got up at 8am.
As I see it, there are two options:
1) Lazarus cockroach
2) Something larger came and ate it
I do not like either of these options.
ETA: It has been suggested to me that the most likely scenario is actually that ants came and took the offending roach away. This I can live with.