His mother, Laurel Harper wrote about her passion for firearms in
online postings to Yahoo! Answers three years ago. "I keep all my mags
full. I keep two full mags in my Glock case. And the ARs & AKs all
have loaded mags," she wrote, referring to magazines of ammunition, a
Glock handgun and military-style rifles.
"No one will be 'dropping' by my house uninvited
without acknowledgement," the post went on to say. Another post
criticizes another person over poor judgement using "airsoft" pellet
guns, and emphasizes gun safety.
Harper did not return phone calls and emails
from NBC News. The email address used in some of the postings appears to
be linked to her.
In another post nine years ago about autism,
Laurel Harper said: "My son has Asperger's. He's no babbling idiot nor
is his life worthless. He's very intelligent and is working on a career
in film making."
A note was found at the scene of
the rampage in which Christopher Harper-Mercer said he was "in a bad
way" and was depressed, law enforcement officials said. His mother told
investigators that he struggled with mental health issues, The
Associated Press reported.