Tucson , Arizona ( CNN ) -- Jared Lee Loughner , accused of a mass shooting in which he allegedly tried to assassinate U.S. Rep. Gabrielle Giffords of Arizona , is n't competent to stand trial , a federal judge ruled Wednesday . U.S. District Judge Larry Burns said he based his decision on two recent court-ordered mental evaluations of Loughner at a federal hospital in Springfield , Missouri . `` The defendant was not able to comprehend the charges , '' Burns said . Loughner has been diagnosed with paranoid schizophrenia by two experts who examined him , Burns said . A 52-page evaluation by psychologist Christina Pietz and a 43-page evaluation by psychiatrist Matthew Carroll both concluded that Loughner is n't fit for trial because he can not assist in his defense due to mental illness . Both evaluations were recorded , but they were n't shown in court . Burns said he agreed with Carroll 's evaluation that said Loughner is `` clearly illogical and confused . '' The judge said Loughner was n't masquerading a mental illness and noted that he had been acting bizarrely for the past two years . The judge also said that Loughner does n't like being labeled mentally ill. `` He scoffs at the idea , '' Burns said . Loughner , 22 , of Tucson , Arizona , has no rational understanding , an `` irrational distrust of his lawyers '' and `` has delusions that prohibit him from considering legal defenses , '' the judge said . The U.S. attorney general will take custody of Loughner for a period not to exceed four months , during which he will be taken to a hospital for further evaluation to determine if he will become competent to stand trial . Prosecutors said Loughner could be readied for competency through proper medication , and this practice has proved successful in other cases . The next court date for Loughner is scheduled for September 21 . He has pleaded not guilty to the 49 charges he faces , including murder and attempted murder , related to the January 8 mass shooting in a grocery store parking lot in Tucson . He is accused of killing six people and wounding 13 , including Giffords , an Arizona Democrat , who was holding a meet-and-greet with constituents at the time . Authorities say Giffords was the target of the attack . Giffords ' office declined to comment on Wednesday 's ruling . During his hearing , two marshals forcibly removed Loughner from the courtroom after an outburst in which one reporter heard him say , `` Thank you for the freak show . She died right in front of me , '' and `` You 're changing ... '' Loughner 's parents , seated in the courtroom , were clearly upset . After a 15-minute recess , Burns asked Loughner if he wanted to watch the remainder of the proceedings on a television monitor . Loughner said yes , and he was removed from the courtroom . Loughner entered the courtroom Wednesday no longer bald and clean-shaven , as he was depicted in his mugshot shortly after the shootings . He now has a full head of hair , along with facial hair . He is accused of killing John M. Roll , a federal district judge ; Gabriel M. Zimmerman , a staff member for Giffords ; Dorothy J. Morris ; Phyllis C. Schneck ; Dorwan C. Stoddard ; and 9-year-old Christina Taylor Green . Giffords , shot through the head and brain , is recovering from surgery that implanted a synthetic bone and a shunt in her skull , her doctors said last week . She was in attendance last week when the space shuttle Endeavour was launched with her husband , astronaut Mark Kelly , in command for a 16-day mission . NASA spokeswoman Kylie Clem said Wednesday she was unsure whether Kelly would be informed of the Loughner ruling and , if so , in what manner . She said there are forms of communication that allow private conversations , such as between crew members and their families . Among those attending Wednesday 's hearing was Susan Hileman , 58 , who was wounded in the shooting , and her husband , Bill . Susan Hileman brought Christina Green to the supermarket to meet Giffords . Christina has often been remembered as the child victim who was born on September 11 , 2001 . Also attending were friends and co-workers of Judge Roll , whose courtroom was in the same courthouse as Wednesday 's hearing , and Mavy Stoddard , 75 , who was wounded in the attack and whose husband , Dorwan , 76 , a retired construction worker , died trying to shield his wife from the bullets . CNN 's Ted Rowlands reported from Tucson and CNN 's Michael Martinez contributed from Los Angeles . CNN 's Michael Cary contributed to this report .
Loughner can not assist in his defense due to mental illness , a judge rules . He agrees with two experts who came to that conclusion after evaluating the defendant . Loughner has an outburst during a hearing and is removed from the courtroom . He is accused of killing six people and wounding 13 .