Army Pvt. Brandon Neely was scared when he took Guantanamo's first shackled detainees off a bus. Told to expect vicious terrorists, he grabbed a trembling, elderly detainee and ground his face into the cement -- the first of a range of humiliations he says he participated in and witnessed as the prison was opening for business. Neely has now come forward in this final year of the detention center's existence, saying he wants to publicly air his feelings of guilt and shame about how some soldiers behaved as the military scrambled to handle the first alleged al-Qaida and Taliban members arriving at the isolated U.S. Navy base. His account, one of the first by a former guard describing abuses at Guantanamo, describes a chaotic time when soldiers lacked clear rules for dealing with detainees who were denied many basic comforts. He says the circumstances changed quickly once monitors from the International Committee of the Red Cross arrived. As Neely put it in an interview with The Associated Press this week, The stuff I did and the stuff I saw was just wrong." Neely, a ... Texan who served for a year in Iraq after his six months at Guantanamo, received an honorable discharge last year ... and now works as a law enforcement officer in the Houston area. He is also president of the local chapter of Iraq Veterans Against the War. An urge to tell his story led him to the University of California at Davis' Guantanamo Testimonials Project, an effort to document accounts of prisoner abuse.