Do I need to use my Email address to access the online evidence?

No, you only need to enter your email/have a Cases & Clues Account to claim loyalty points when you have completed one of the cases. 

All you need to access the hints and tips, digital evidence, and the answer page is the physical Cases & Clues game as this will have all of the links and QR codes inside to navigate to these pages. 

If you are purchasing one of the games as a gift for someone, they don't need an email address to play the game. If you have purchased an Ultimate upgraded version of the game, you will need to seperately send the link with the Ultimate Upgrade information to that person when they are ready to play the game. This will have been sent to the email address used to place the order.