Both sides in Minnesota's tobacco trial claimed a University of Minnesota history professor boosted THEIR case. Defense witness Historian Hy Berman repeated a tobacco company theme that Minnesotans have long known about the health risks of smoking. But Berman also supported evidence that showed the industry misled the public. Minnesota public radio's Elizabeth Stawicki reports: At times it was hard to know just who Hy Berman was testifying for. The tobacco attorneys had hired him but when Berman stepped down from the witness stand he gave a thumbs up and a warm handshake to state's attorney Mike Ciresi. Even after court Berman refused to take sides: