The headline at The NYT is "Mother of Oregon Gunman Wrote of Keeping Firearms," but I think that's the 3rd most interesting revelation...

... in the article.

First is the additional reason to think that the now-dead murderer was autistic:

Laurel Margaret Harper... acknowledged having expertise in dealing with autism, saying that both she and her son — whom she never identified by name — had Asperger’s syndrome, an autism spectrum disorder... She... said she had “dealt with it on a daily basis for years and years”... “He’s no babbling idiot nor is his life worthless,” Ms. Harper wrote. “He’s very intelligent and is working on a career in filmmaking. My 18 years worth of experience with and knowledge about Asperger’s syndrome is paying off.”

2 days ago, here, I raised my suspicion that the young man was autistic.

Second is the fact that this woman, who advocated reading to an autistic child, for some reason choose as the appropriate reading material, Donald Trump's "Art of the Deal":

“Fact: Before my son was even born, I was reading out loud to him from Donald Trump’s ‘The Art of the Deal,’” she wrote. “And as for the ‘gesture effect,’ I was practically a mime. And now my son invests in the stock market along with me, turns a profit and is working on a degree in finance. His language and reading skills are phenomenal. I tell you this because it’s not too late for you to start helping your daughter.”