Photo forensics: Identifying faked pictures

Recently a family member sent me a set of pictures supposedly showing Mexican headstones with insulting epitaphs

All of the images struck me as improbable: for example, the lettering was astonishingly clear and black on the headstones. Remembering a 2006 article in this column by two Norwich University students summarizing a lecture they heard at Dartmouth College on "Picking out digital image forgeries," I decided to examine the pictures in more detail to see if I could find evidence of fraud.

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