; and (2) in the case that a public safety officer described in paragraph (1) dies by suicide (for purposes of a claim under subsection (a)), or is permanently and totally disabled as a result of post-traumatic stress disorder, including as a result of attempted suicide (for purposes of a claim under subsection (b)), such death or disability shall be presumed to be a direct and proximate result of such engagement, unless competent psychological or medical evidence establishes that the post-traumatic stress disorder was unrelated to the engagement or was directly and proximately caused by something other than the mere presence of post-traumatic stress disorder risk factors. For purposes of paragraph (2), a public safety officer shall be considered permanently and totally disabled as a result of post-traumatic stress disorder if the officer is unable to serve as a public safety officer in the same or substantially similar role as the officer was serving prior to suffering from post-traumatic stress disorder. . 4. GAO report On the date that is one year after the date of the enactment of this Act, the Comptroller General of the United States shall submit to Congress a report on benefits issued pursuant to subsection (o) of section 1201 of the Omnibus Crime Control and Safe Streets Act of 1968 ( 34 U.S.C. 10281 ), as added by this Act, and any recommendations to improve such subsection.