Revolution is necessary

I m going on a killing spree,
Killing the ones who killed me,
Long trench coat holsters on side,
This is it, This is how I die,
The darkness has consumed,
Not ending in a padded room,
Oh Yes I intend to kill,
I'll fire my guns at will,
Down to my knees,
Blood all over the scene,
A signal shot to the head,
Leaves me there dead.