Image manipulation detection is equally an issue in the legal system.  Admitting manipulated photographic evidence to court is both a growing trend and a growing concern.  As it stands the authenticity of a photograph is contingent on the honesty of the witness.  An image forensic expert is only called upon when there are no witnesses to testify in a lawsuit or when the photographic evidence has its integrity challenged.  There is no other standard procedure to have photo evidence truly vetted. The 400 billion USD legal industry in the U.S. alone needs a better way to admit and challenge photographic evidence.