Reports on the federal Office of Research Integrity's (ORI) issuance of a long-delayed report concluding that immunologist Thereza Imanishi-Kari fabricated data in a 1986 paper on immune function in mice that she co-authored with Nobel prizewinner David Baltimore and four other researchers. Cover-up of allegations with additional fabrications; Implications of case for Imanishi-Kari's career and the ORI.