More problematic are the lone wolf shooters who strike without warning. Absent some previously documented manifesto, rant, suicide note, or threat, the motives of many are left to be inferred in the aftermath of their deaths, which may be part of their design.
According to David Klinger, associate professor of criminology and criminal justice at the University of Missouri at St. Louis, police officers have to be aware that the same suicidal individuals who phone in phony calls and the classic "suicide-by-cop" situations may show up at police departments as well. Interdicting such threats is difficult, but police officers have to stand their ground. And this includes those suspects whose primary agenda is to assassinate cops.
Earmarking this latter demographic is a greater proclivity toward preparation. Determined to maximize their opportunities for kills, they may carry multiple firearms and extra ammunition, and wear ballistic protection.
Last August, 29-year-old Patrick Gray Sharp towed a trailer loaded with explosives into the parking lot of the McKinney, Texas, police station before setting his Ford F150 pickup on fire and firing more than 100 rounds at police headquarters from a field across the street. Amazingly, the trailer didn't ignite and nobody was killed, except for Sharp who eventually put a bullet in his own head.
In March, John W. Futrell allegedly entered the criminal investigative division of the Grant Parish (La.) Sheriff's Office armed with a rifle, handgun, and knife, as well as extra magazines of ammunition for each firearm. Authorities say Futrell opened fire, wounding Dep. Barkley Roberts in the chest before being wounded himself by return fire from sheriff's deputies.[PAGEBREAK]