 Defenders of Garrison, such as journalist and researcher Jim Marrs, argue that Garrison's case was hampered by missing witnesses that Garrison had sought out.These witnesses included right-wing Cuban exile, Sergio Arcacha Smith, head of the CIA-backed, anti-Castro Cuban Democratic Revolutionary Front in New Orleans, a group that David Ferrie was reputedly "extremely active in", and a group that maintained an office in the same building as Guy Banister.According to Garrison, these witnesses had fled New Orleans to states whose governors refused to honor Garrison's extradition requests.