MSNBC is nowhere to be found.

Via Ammoland: 

A school resource officer shot a teen gunman and prevented a possible mass shooting at Dixon High School in Dixon, Illinois.

Matt Milby, 19-year-old, entered the Dixon High School gym where the seniors were practicing for graduation on Wednesday morning around 8 AM. The recently expelled student opened fire on school resource officer Mark Dallas. Dallas returned fire causing Milby to retreat from the gym.

After a brief chase, Milby turned around and once again fired on the school resource officer. Officer Dallas returned fire striking Milby in the shoulder ending the pursuit. Officer Dallas took Milby into custody.

It has not been released what type of gun was used in the attack, or how the gun was acquired.

Read more here.