From what I've heard about the shooter...
The tard, allegedly posted his plans and intent to kill, on a social media site. Nobody reported him.
Yep...on 4chan...even had other 'tards telling him how to make it as worse as possible...
"" Federal authorities are looking into a suspicious
thread on the anonymous message board
4chan that appears to include someone with
similar intentions to today's unnamed shooter
who killed at least 10 people in
Oregon, according to The New York Times . The
thread, archived here , shows an anonymous
user on 4chan board /r9k/ advising others,
"Don’t go to school tomorrow if you are in the
northwest," late in the day on September 30th.
The identity of the shooter who attacked
students this morning at Umpqua Community
College in Roseberg, Oregon, remains
unknown, though it is confirmed police shot
and killed the 20-year-old man.
It is not yet clear whether the anonymous
4chan user and the shooter are the same
person. 4chan has become well-known as a
haven for some of the worst behavior on the
internet. In fact, many users egged on the
original poster and some even gave him tips on
how to carry out a massacre. Following news
of the shooting, the thread takes a twisted turn
as participants realize the gravity of a potential
link between the group conversation and the
killings. Nonetheless, the nature of the site
makes quick verification near impossible.""
http://www.theverge.com/2015/10/1/9437577/4chan-federal-investigation-oregon-college-shooting
Same site that a year or so ago, a poster posted a thread about a woman he strangled...with pics of her dead body....poster was subsequently arrested and charged with the murder.