Please clarify, at the top of the page it's written: "48 Hour Crime Scene contains 24 Hour Crime Scene within it, so you don't need both games to play".
In the middle we can read: "Included with the game are alternative game modes[...]12/24/36/48 Hour Crime Scene: We're also including a way to create your own unique game variant".
And then goes the bottom of the page: "You don't need 24 Hour Crime Scene to play 48 Hour Crime Scene but 24 Hour Crime Scene had its own rules and set-up that is not included in 48 Hour Crime Scene".
Sooo it contains the 24 Hour Crime Scene as a variant, but it doesn't include its rules?