The Los Angeles Times says that positive urine samples and other drug-test records that the government says shows that Barry Bonds knowingly used steroids was determined to be inadmissable in court. The 9th U.S. Circuit Court of Appeals ruled on this today.

Barry Bonds is on trail on charges of lying to a federal grand jury about taking steroids and other banned substances.

Legal experts now believe the trial could be dropped now that crucial evidence has been excluded.

“When lawyers have invested a lot of time and emotional capital into a particular case, it is not easy to let go,” said University of San Francisco law professor Robert Talbot. “But it will be pretty hard for them to win. That was key evidence.” The lab results seized during a raid by federal agents impugned more than 100 professional baseball players.