ROSEBURG, Ore. (AP) -- The gunman who executed nine people at an Oregon community college before killing himself ranted in writings he left behind about not having a girlfriend and thinking everyone else was crazy, a law enforcement official said Monday.
The official also said the mother of 26-year-old gunman Christopher Harper-Mercer has told investigators he was struggling with some mental health issues. The official is familiar with the investigation but wasn't authorized to speak publically because it is ongoing.
Harper-Mercer complained in the writings about not having a girlfriend, and he seemed to feel like he was very rational while others around him were not, the official said.
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