Image is edited or not?

Do you ever got an image in which something is paranormal but the owner claims its real not edited?
How you will identify that the image is edited or not by photoshop?
Well, this seems to be difficult but its not!!!
Just follow my instructions.
Requirements: JPEGsnoop - JPEG File Decoding Utility

This is the one and only requirement of size 500 KB(~approx).
Get it from the above link(Go through the above link and find Click to Download .ZIP and click to download).
Run it. Will look like this, 

Now, click on File>Open Image, locate the image the click on open. Wait for few seconds, and then drag the scroller down.
Look for the result at the bottom.

Check the result, if the image is edited the result will be "ASSESSMENT: Class 1 - Image is processed/edited" but if its not edited the result will be "ASSESSMENT: Class 4 - Uncertain if processed or original
While the EXIF fields indicate original, no compression signatures
in the current database were found matching this make/model"
Disclaimer: This tool and method may sometimes give false information, for example if you have scanned the imagem in a computer scanner then the tool will say processed.