By Jonathan Allen ST PAUL, Minn. (Reuters) -Tou Thao, one of the three former Minneapolis police officers on trial charged with violating George Floyd’s civil rights, told a jury officers were trained to use a knee near a person’s neck as a means of restraint as he took the stand in his own defense on Tuesday. Thao, 36, is on trial in the U.S. District Court in St. Paul alongside J. Alexander Kueng and Thomas Lane, accused of violating the 46-year-old Black man’s right to receive medical care as he lay dying under the knee of their former colleague, Derek Chauvin, during the arrest on May 25, …