amal khalifa, ramy zamzam's mother, said he did tell her he was going away to baltimore. he disappeared what in late november? >> i can't say he disappeared. he told me before he leave he's going somewhere and he takes two sets of clothes, a lot of jeans and shirts, to spare shampoos so everything and he says i'm going out, be out for a few days. >> reporter: did you believe him? >> i thought he may be going farther than baltimore, like florida, new york, you know, like young men this age. >> reporter: zamzam had been a promising dental student. but after the young men disappeared, a video was discovered featuring him. speaking to the camera. it prompted parents of the other youths to notify the fbi. the video is now in the hands of law enforcement, but officials have said it also showed scenes of war and declared "muslims must be defended." nihad awad, cair's executive director, saw the video and said he found it troubling. >> i recall the video is about 11 minutes. and it's like a farewell. and they didn't specify what they will be doing. but just hearing and seeing vid