PESHAWAR - Law-enforcement agencies on Friday apprehended another illegally staying US national from a house situated at Falcon Complex in University town, police sources said. The US national identified as Aaron Mark De Haven, belongs to West Virginia State in the US. The arrested US national had acquired his Pakistani visa on January 2010, which had already expired on October 23, 2010. The sources said that Aaron Mark De Haven had neither registered himself in the concerned Immigration Department nor had renewed his visa for the last four months, thus, he was staying illegally since then. On Friday, the law-enforcement agencies raided the room of US national, who has been staying at a house at Falcon Complex in University Town in the jurisdiction of University Police station. For having expired visa, police arrested him and police registered FIR against Aaron Mark De haven under 14 Foreign Act. Sources said in the initial investigation Aaron disclosed himself an employee of USAID. However, it is yet to be determined that for what purpose he has been staying in Pakistan despite having an expired visa. Soon after his arrest, police shifted him to unknown place for further interrogation. Monitoring desk adds: Little was known about DeHaven except that his firm, which also has offices in Afghanistan and Dubai, is staffed by retired US military and defence personnel who boast of direct experience in the global war on terror, reports Guardian. DeHaven runs a company named Catalyst Services which, according to its website, is staffed by retired military and defence department personnel who have played some role in major world events including the collapse of the Soviet Union, the military mission to Somalia and the global war on terror. Services offered include full-service secure residences, protective surveillance and armed security. One prospective customer who met DeHaven last year described him as a small, slightly-built man, who wore glasses and had broad knowledge of Pakistani politics. DeHaven said he had lived in Kandahar, Afghanistan, for one year, had married a Pakistani woman along the border with Afghanistan, and spoke Pashto fluently. He said he moved his base from Peshawar to Islamabad last year over suspicions that he worked for Blackwater, the controversial US military contracting firm. His business partner is listed on company documents as Hunter Obrikat with an address in Charlotte, North Carolina. US embassy spokeswoman Courtney Beale said DeHaven was not a direct employee of the US government but added that details could not be confirmed until a consular officer had met him. US officials in Washington argue that Davis is a registered diplomat who should be immediately released under the provisions of the Vienna convention. But that plea has fallen on deaf ears in Pakistan, where the papers have been filled with lurid accounts of the spys alleged activities, including unlikely accounts of him working with the Taliban and al-Qaida. The US has also struck some blows in the covert public relations war. After a lull of three weeks, the CIA restarted its drone campaign in the tribal belt last Monday, with near-daily attacks on militant targets since then. Its their way of showing whos in charge, said a senior Pakistani official. And at the Oman meeting, Mullen warned Kayani he would apply other levers to the Pakistanis if a solution to the case was not found, the official added. Since Daviss CIA status was revealed, US officials have told Pakistani officials that their best hope is in offering compensation to the families of the two men Davis shot in Lahore. Religious parties, however, have pressured relatives not to accept money. Meanwhile, the Zardari government says it will settle the issue of Daviss diplomatic status at a court hearing scheduled for 14 March.