Ok.... Just to clarify! You must put your theory on how the victim died in your entry! For example:

Macy entered the parlor and gave her theory about how the victim died.. Blah blah blah with a gun blah blah blah and that's how he died! I know your the killer Giles!

If you still don't understand just go look up whodunit on YouTube and go to the very end and you'll see what I'm taking about! Anymore questions please just ask me! And I'm sorry I didn't explain this very well:-/