Yee learned of the taboo on Chinese testimony firsthand after he arrived in Las Vegas. At the laundry where he went to meet his friend, there was an altercation and Jim Lee, another Chinese man, was shot and killed. Yee, who was 20 years old at the time, was accused of the murder.
At the trial, Jo Chinaman, the laundry’s owner, was called to testify. When he faced the judge, he was asked about whether he was Christian and whether he understood the court’s oath. Jo Chinaman said that he was not a Christian and didn’t understand the oath, but that he would tell the truth. Then he testified that Yee had killed Jim Lee.
Yee’s defense claimed that Yee had been unarmed and that the murder was due to a grievance between the town’s tongs, or Chinese gangs. But based on the testimony of several witnesses, only one of whom pointed the finger at Yee, the jury found Yee guilty of second-degree murder. He was sentenced to life in prison.
Yee’s lawyer believed that Jo Chinaman’s testimony was invalid, since taking the Christian oath required of witnesses was predicated on being Christian. But since Yee’s attorney had not called witnesses of his own and asked them about Chinese religious beliefs and oaths in front of the jury, the appellate court ruled that Jo Chinaman’s testimony, and Yee’s conviction, should stand. A despairing Yee killed himself in prison shortly after.