The federal contract with GEO Group to operate Tacoma’s Northwest ICE Processing Center is set to expire Oct. 27, leaving the facility’s future uncertain as Washington congressional members seek information about a possible federal purchase. U.S. Immigration and Customs Enforcement has not said whether it intends to buy the detention center. The possibility appeared in a federal document in August, but no purchase has been confirmed. GEO Group, a billion-dollar corporation, currently operates the immigrant detention facility under a federal contract. The approaching expiration puts the question of who will run the center — and whether ICE will own it — in focus for lawmakers and the Tacoma community.