The device that Jack uses to immobilise Petra and Sarah is a taser or stun gun. A Taser or conducted electrical weapon is an electroshock weapon sold by Taser International. It fires two small dart-like electrodes, which stay connected to the main unit by conductors, to deliver electric current to disrupt voluntary control of muscles causing “neuromuscular incapacitation”. Someone struck by a Taser experiences extreme pain and over-stimulation of sensory nerves and motor nerves, resulting in strong involuntary muscle contractions. Tasers will incapacitate, not just cause pain compliance, and are thus preferred by some law enforcement over non-Taser stun guns and other electronic control weapons, which, like a Taser when used solely in “Drive Stun” mode, can only do the latter. In the UK Tasers are considered “prohibited weapons” and possession is an offence. The maximum sentence for possession is ten years in prison and an unlimited fine. There is a minimum sentence of 5 years imprisonment if the taser is disguised as another object such as a torch or a mobile phone.
An electroshock weapon is an incapacitating weapon. It delivers an electric shock aimed at temporarily disrupting muscle functions and/or inflicting pain without causing significant injury. Many types of these devices exist. Stun guns, batons (or prods), and belts administer an electric shock by direct contact, whereas Tasers (conducted electrical weapons) fire projectiles that administer the shock through thin flexible wires. Long-range electroshock projectiles, which can be fired from ordinary shotguns and do not need the wires, have also been developed.
Thanks to an e-fit picture Jack is identified. Electronic Facial Identification Technique (E-FIT, e-fit, efit) is a computer-based method of producing facial composites of wanted criminals, based on eyewitness descriptions.