For as long as humans have been making images, we have also been manipulating them.
Complex darkroom techniques were once required to modify images but now anyone with a smartphone can apply hundreds of changes using freely available tools.
While this may be convenient for your Instagram feed, it presents a unique challenge for law enforcement. Images cannot always be trusted as an accurate depiction of what occurred.
For example, I recently analysed several photos for the RSPCA showing a duck with a knife embedded in its head to determine if they were photoshopped.
