Introduction According Ex-Special Agent Robert Wright Jr., the FBI had evidence that the World Trade Center was a possible target. Wright also complained that when he tried to pursue certain terrorist investigations, he faced retaliation from his bosses. He said “ virtually no effort on the part of the FBI’s International Terrorism Unit to neutralize known and suspected terrorists residing in the United States. Unfortunately, more terrorist attacks against the American interests, coupled with the loss of American lives, will have to occur before those in power give this matter the urgent attention it deserves. ” (Buckley, 2006) The entire procedure, thus, was needed to be changed and homeland security was established and changed the whole perspective of security and this had a thorough impact on criminal investigative techniques. Background The US government to counter the terrorism prevailing in the country, passed the PATRIOT Act post 9/11 under homeland security, to “ deter and punish American terrorists in the United States and around the world, to enhance law enforcement investigatory tools, and for other purposes .” (Buckley, 2006) It also proposed the formation of another counter-terrorist agency along the lines of the British Security Service, also known as the MI-5. MI-5’s role is the protection of British parliamentary democracy and economic interests, counter-terrorism and counter-espionage within the United Kingdom. Its main concern is to utilize its’ intelligence to track and counter terrorism within the UK. Fourth Amendment The structural design of the process has been crafted specifically keeping the needs of the local community in mind. The program has been designed in a manner which meets the terms and conditions of the Wilmington Police Department’s internal policies. The process demonstrates conformity to the 4 th Amendment’s arrest, search and seizure norms laid down by the US Supreme Court and the North Carolina general statutes. All certification issues are handled efficiently with all standards being met. (Mackenzie, 2006) It should be remembered that the disaster of 9/11 took place when the terrorists took advantage of the American social way of life where the number of domestic frequent fliers are high enough to suffer a low security system. The same is true about London underground rail blast. In both the cases, the terrorists took advantage of the counties’ way of social life and it would be impossible to alter this way of life putting security as an alibi where the menace is organized by a fundamentalist motive. (Bennett, Hess and Orthmann, 2006) Homeland security The United States Department of Homeland Security or DHS can be considered as the Cabinet Department of their Federal Government whose main responsibility is the protection of vulnerable US territories from the terrorists and to respond to any natural calamity. They function in USA’s civilian sphere so as to protect from the inside as well as outside the borders. They came into being as a result of the 9/11 attacks on the USA and since then have been successfully preparing USA to avoid and respond immediately to any future domestic emergencies that take place on the nation, mainly acts of terrorism. The DHS is the 3 rd largest department of the cabinet and their policies are coordinated by the Homeland Securit