Delete isn’t enough anymore. Consider the case of Robert Johnson, the former Newsday publisher who, prosecutors allege, used a software program called Evidence Eliminator to rid his computers of CP. Pressing ”delete” makes files invisible, perhaps, but it doesn’t make them gone. Making files gone has become a booming industry unto itself. Sales of Evidence Eliminator run in the millions of dollars each year, says Andrew Churchill, managing director of Robin Hood Software of Britain – and it’s just one of more than a dozen ”file shredder” or ”anti-forensic” products on the market…