Air Force instructor convicted of rape, sexual assault in military sex scandal A military jury has convicted an Air Force instructor of rape, sexual assault and all other counts he faced as part of a sweeping sex scandal at the Texas base where all U.S. airmen go through basic training. Staff Sgt. Luis Walker showed no emotion as the verdict was read Friday in an Lackland Air Force Base courtroom. The jury made up of seven military personnel convicted him on all 28 counts he faced. He faces up to life in prison. Walker is one of 12 Lackland instructors investigated for sexual misconduct. He faced the most serious charges among the six instructors who have been charged. Prosecutors say Walker raped one female trainee and sexually assaulted or had inappropriate sexual or personal contact with nine others.