Corrected entry: Throughout the movie, the setting takes place on Io which has a gravitation that is roughly one fifth of that on earth, very much like our moon. In real life all characters would be bouncing like kangaroos and all objects dropped, float like feathers. Even so, whatever the pull, it affects all objects equally and in the same direction meaning it would be impossible for Spotas dead body to float in the jail cell in a no-gravity manner while his blood drips upward (away from the surface i might add). (00:57:20)
Corrected entry: Why doesn't Marshall simply send request for help to Earth, after he finds out the foul play that is corrupting even the "Io PD"?
Correction: At the end he sends a message to his wife, something about "looking forward to sleeping with you for a year".(A year to get to Io would be about right with the tech we have now, and the movie doesn't really show any radically advanced technology.) If it takes a year to get honest cops there, what's the point?
Correction: As with most science fiction films set in space, the facility has some unexplained system of artificial gravity. This is evidenced by the fact that characters are able to jump very high when outside but not inside. The jail cells simply do not use the artificial gravity or atmosphere of the facility. This makes it more difficult for the prisoners to try to escape.