Your case hinges upon what device was used to create the image. If it's a regular old camera, it might be harder to tell what the image creation date & time was if the person never set the date within the menu function. But, if it is a cell phone or other mobile device, all images have a creation date based upon the devices internal clock setting (those are always up to date & time). I would do a more thorough search of the EXIF data, which may tell you what device was used and if there were any changes made to the original file. Sounds like they sent it from a mobile device, which means you got 'em!