you have to get coding to 1000 before night 10 because you will get a usb in the vip room when you clean it and you need 1000 coding to decrypt it then get missing persons to 1000 like right after you will find out her name then you will see the Marie secret. Now if you want to get Lexy and the secret then it will be a little harder because you have to get paranormal to 350 (just 350) and you will see her on night 6 but right after that you need to max out both coding and missing persons (i recommend doing coding fully first and then missing persons)