Shadow Wolves Enhancement Act This bill authorizes U.S. Immigration and Customs Enforcement (ICE) to reclassify officers assigned to the tactical patrol unit on Tohono O'odham Nation land (commonly known as Shadow Wolves ) as ICE special agents upon completing certain required training. The Government Accountability Office shall study the best processes for expanding the Shadow Wolves program to areas not located on tribal lands that are historically and culturally significant for tribal communities.