Iowa senator demands Congress probe on how Shahzad became U.S. citizen

Washington, May 7 (ANI): The Republican Senator from Iowa, Charles Grassley, has sent a letter to Department of Homeland Security Secretary Janet Napolitano asking for the "Alien" file on Times Square bomber Faisal Shahzad and his family members and for everyone who has been a reference or a sponsor for the terror suspect.

Keen to know how Shahzad was granted American citizenship, Senator Grassley wants to know if this file was in the hands of the official who approved Shahzad's citizenship.

An Alien or "A" file includes visa and travel history, financial and personal information as well as any derogatory information from law enforcement.

According to CBS News, Grassley also wants Shahzad's arrival forms that he filled out each time he re-entered the United States and whether or not he sponsored other individuals to become citizens.

CBS news reported Wednesday that Faisal Shahzad had appeared on a Department of Homeland Security watch list between 1999 and 2008 because he brought 80,000 dollars of cash into the United States.

Grassley wants the documents by May 11, 2010. (ANI)