Kammala wannan magana: A lokacin da ya yi ritaya, Gehman ya yi aiki a matsayin shugaban hukumar binciken hadarin Columbia, co-shugaban, tare da janar William W. Crouch, na Ma'aikatar Tsaro
Kwamitin Cole, a kan Kwamitin Sake Gyara da Rufewa (BRAC), kuma Babban Malami ne na Cibiyar Kula da Tsaro ta Kasa.