Officials used 'vein-matching ' to tie Khalid Sheikh Mohammed to Pearl 's killing , report says . Mohammed has said he killed the journalist , but has not been charged . The scene `` would later turn the stomachs of even the most hardened Pakistani and U.S. investigators , '' the report states . Comment:
Officials used 'vein-matching ' to tie Khalid Sheikh Mohammed to Pearl 's killing , report says . Mohammed has said he killed the journalist , but has not been charged . Comment: