FILE - In this July 16, 2012 file photo, U.S. Air Force Staff Sgt. Luis A. Walker arrives from a lunch break during his court martial at Lackland Air Force Base in San Antonio. A seven-

 

              FILE - In this July 16, 2012 file photo, U.S. Air Force Staff Sgt. Luis A. Walker arrives from a lunch break during his court martial at Lackland Air Force Base in San Antonio. A seven-
FILE - In this July 16, 2012 file photo, U.S. Air Force Staff Sgt. Luis A. Walker arrives from a lunch break during his court martial at Lackland Air Force Base in San Antonio. A seven-member jury of military personnel is set to hear closing arguments in a case considered the cornerstone of a massive sex scandal at an Air Force base in Texas. Walker is among 12 instructors at Lackland Air Force Base in San Antonio who are being investigated, and faces the most serious charges _ seven counts, including rape and aggravated sexual assault. If convicted, Walker could get life in prison. (AP Photo/The San Antonio Express-News, Jerry Lara, File) RUMBO DE SAN ANTONIO OUT; NO SALES