And he had started to act oddly during his classes at Pima Community College, causing unease among other students.

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Despite recommendations from Pima Community College that Loughner undergo a mental evaluation after the school expelled him, his parents never followed up.

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Mr Loughner said his son did not get a mental health evaluation recommended by Pima Community College after it expelled him in October 2010.

BBC: Gabrielle Giffords in March 2013