A True Crime anthology taking a look back at some of the more infamous mass shootings in history. Brenda Spencer was an abused teenager who lived across the street from the elementary school where she began firing upon after she had a "bad Monday." Sylvia Seegrist was a certifiable nut job who drank carpet cleaning liquid for kicks...but when she had a gun in her hand it spelled doom for the patrons at a local shopping mall. Thomas Dillon was thought of as nothing more than a 'weird guy' at work but when a sniper began to terrorize the small town residents knew that there was more to the creepy Dillon then met the eye.