MINNEAPOLIS—Attorneys for three former Minneapolis police officers charged in George Floyd’s death asked a judge Thursday to bar their upcoming trial from being livestreamed, saying some witnesses won’t testify if the proceedings are broadcast. The request from attorneys for Thomas Lane, J. Kueng and Tou Thao is an about-face from their earlier request to have the trial publicly broadcast, and is opposed by prosecutors and news outlets including The Associated Press. Hennepin County Judge Peter Cahill said he would rule on the issue later. Lane, Kueng, and Thao are scheduled to stand trial next March on charges of aiding and abetting both second-degree murder and manslaughter in Floyd’s May 2020 death. Their co-defendant, Derek Chauvin, was convicted in April of murder and manslaughter after weeks of proceedings that marked the first time in Minnesota that a criminal trial was livestreamed in its entirety. Before Chauvin’s trial, attorneys for all four …