India, Sept. 18 -- An Indian man who migrated to the United States 30 years ago and is now a green card holder, Paramjit Singh, was detained over a month ago in Chicago on 30 July upon his return from his visit to India, said his lawyer .

Paramjit Singh reportedly has a business in Fort Wayne, Indiana, and also suffers from a brain tumour and a heart condition.

While returning from India, a trip Singh's family said he makes several times a year, he was detained at Chicago's O'Hare Airport on July 30, reported local news outlet WPTA.

Paramjit Singh's lawyer, Luis Angeles, said that according to the department of homeland security, he was detained due to a "very old case".

"According to ICE, according to (the Department of Homeland Secu...