When Jamie Madrox set up a detective agency in Mutant Town, New York, he initially called it XXX (Triple X) Investigations. At the suggestion of his old teammates Rahne and Guido, however, it was renamed X-Factor Investigations. The operation has expanded to include several new partners since it was founded, briefly moving to Detroit, Michigan as X-F Investigations under Theresa Cassidy, but currently has returned to New York City for its base of operations.
