PHOENIX (AP) - Almost everyone who crossed paths with Jared Loughner in the year before he shot former Rep. Gabrielle Giffords described a man who was becoming more unhinged and delusional by the day. He got fired from a clothing store and thrown out of college, shaved his head and got tattoos of bullets on his shoulder. He showed up at the apartment of a friend with a Glock 9 mm pistol, saying he needed it for "home protection." He made dark comments about the government, and, according to one acquaintance, appeared suicidal. Loughner's spiral into madness hit bottom on Jan. 8, 2011. He broke down in tears when a wildlife agent pulled him over for a traffic stop. He went to a gas station and asked the clerk to call a cab as he paced nervously around the store. Gazing up at the clock, he said, "Nine twenty-five. I still got time. About 45 minutes later, Giffords lay bleeding on a Tucson sidewalk along with 11 others who were wounded. Six people were dead. The information about Loughner's mental state - and the fact that no one did much to get him help - emerged as a key theme in roughly 2,700 pages of investigative papers released Wednesday. Still, there was nothing to indicate exactly why he targeted Giffords. The files also provided the first glimpse into Loughner's family and a look at parents dealing with a son who had grown nearly impossible to communicate with. But you can't," his father, Randy Loughner, told police. His mother, Amy Loughner, recalled hearing her son alone in his room "having conversations" as if someone else were there. Despite recommendations from Pima Community College that Loughner undergo a mental evaluation after the school expelled him, his parents never followed up. In a statement released by the gun control advocacy group she started with her husband, Giffords said that "no one piece of legislation" would have prevented the shooting. However, I hope that commonsense policies like universal background checks become part of our history, just like the Tucson shootings are - our communities will be safer because of it. While such checks may keep those with mental illnesses from obtaining guns, the 24-year-old Loughner had never been diagnosed with any conditions, meaning it's doubtful much would have stopped him from legally purchasing a weapon. Friends and family interviewed by law enforcement after the shooting painted a picture of a young man who was deeply troubled in the weeks before the shooting. Loughner visited Anthony George Kuck, who had known him since preschool. Kuck said he was alarmed to find he had shaved his head and was armed. "I kicked him out of my house because he showed me his gun," Kuck said. Kuck told police he had seen Loughner's mental state deteriorate over time, starting with drinking problems in high school, trouble with authorities and being kicked out of college. His parents grew alarmed over his behavior on several occasions - at one point submitting him to drug-testing. Loughner bought a 12-gauge shotgun in 2008, but his parents took it away from him after he was expelled from college and administrators recommended he not own weapons. On the day of the shooting, he and his father got in an argument, and he chased Jared Loughner away from their house. Friend Bryce Tierney told investigators Loughner called him early in the morning that day and left a cryptic voice mail that he believed was suicidal. Onetime Loughner friend Zachary Osler explained how he worked at a sporting goods store where Loughner bought the handgun used in the shooting. He was questioned about seeing Loughner shopping there sometime before Thanksgiving and described an awkward encounter with the man. News organizations seeking the records were denied access in the months after the shooting and the arrest of Loughner, who was sentenced in November to seven consecutive life sentences, plus 140 years, after he pleaded guilty to 19 federal charges. Last month, U.S. District Judge Larry Burns cleared the way for the release of the records after Star Publishing Company, which publishes the Arizona Daily Star in Tucson, joined by Phoenix Newspapers Inc., which publishes The Arizona Republic, and KPNX-TV, sought their release. Loughner's guilty plea enabled him to avoid the death penalty. He is serving his sentence at a federal prison medical facility in Springfield, Mo., where he was diagnosed with schizophrenia and forcibly given psychotropic drug treatments to make him fit for trial. Loughner's attorney, Judy Clarke, didn't return a call seeking comment Wednesday. There was no listed telephone phone number for Randy and Amy Loughner. She resigned from Congress last year. Giffords intern Daniel Hernandez described how people were lining up to see Giffords on the morning of the shooting. When he was arrested at the scene, Loughner was wearing peach-colored foam earplugs and had two loaded magazines in his left front pocket for the Glock he used in the shootings. Hours later, he was polite and cooperative as detectives began their initial interview. Today, Giffords is still recovering. She struggles to speak in complete sentences and often walks with the help of her husband. In a January interview on ABC News, she said "daggers" to recount her tense, face-to-face encounter with Loughner at his sentencing. When asked to describe his mental illness, she said one word: "sad."