 When it became clear that there is only one wounded person in the tank and that the fourth crew member was missing, an abduction alert was declared and various Israeli troops entered Gaza.Shalit's captors held him in a secret location in the Gaza Strip for a total of 1,934 days leading up to the prisoner swap deal.While in captivity, Hamas refused to allow the International Red Cross access to Shalit, and the only indications that he was still alive were an audio tape, a video recording, and three letters.