The World - News from Aug. 13, 1987

A defense witness in John Demjanjuk’s war crimes trial in Jerusalem had trouble reproducing test results she said show that a key piece of prosecution evidence--a Nazi identity card--is a forgery. American documents expert Edna Robertson has partially based her contention that the card was forged on a claim that a stamp covering both the document and a photograph attached to it has two different kinds of ink--one on the picture, the other on the paper. But when the prosecution produced a machine in court that can distinguish between different inks by measuring their luminescence, Robertson was unable to show clearly that the inks were different.