Employees and their lawyers have increasingly pursued employment litig
ation as cases to be tried to juries in federal and state court, parti
cularly since the recent amendments to Title VII. Rules of evidence ta
ke on a greater significance in such matters as compared to bench tria
ls and arbitrations under collective bargaining agreements. The creati
vity of the advocacy of both employee and employer counsel is often co
nstrained by evidentiary rules and precedent. While the nature of evid
entiary rulings often makes it hard to generalize and to predict rulin
gs, it is helpful for both advocates and counselors in this area to co
nsider how evolving interpretations of classic evidence concepts can i
mpact current claims. Of particular note is the Supreme Court's recent
decision approving-with substantial limitations-the ''after-acquired
evidence'' concept as a defensive technique. The upsurge in sexual har
assment litigation is testing the limits of the concept of ''expert''
testimony and also invites special attention to a recent amendment to
Rule 412 of the Federal Rules of Evidence. Other recurring and new evi
dence problems unique to employment litigation include the use of ''st
ray remarks,'' statistics, Equal Pay Act ''comparators,'' and internal
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