It is theoretically possible. If you want to switch teams, you have to exit the game and log in again. You will resume the game exactly where you changed roles. But let's be serious. You are undertaking a criminal case, and this is not kindergarten, so you can't act as if you have teleportation and body-swapping powers at your disposal. This is about the Cryptic Killer, not a science fiction story. If we make a game in a sci-fi world in the future, teleportation will be something we will look into, possibly even body-switching!