ibrahim was 13 years old when isis took his town of deir ezzour, and enlisted him and hi friends. >> ( translated ): they started to recite verses from the koran, speeches from mohammedaid they were the real islamic state and would fulfill all the obligations of islam. they came to us and said you will be martyrs and you will earn paradise and virgins. >> reporter: he says he began ah an informer, and then graduated to weapons training. >> ( translated ): they had me to be a rat for the people who smoked, who didn't go to mosque, they forced me to follow the t women who didn't wear the right clothes and bring them from the street. sometimes they brought captive soldiers, and they told us if you want to kill any of these prisoners you are allowed toto kill them. >> reporter: his mother says isis began a form of brainwashing. >> ( translated ): he thought he became a man. the told him this will make you a real man and you will enteral paradise. leave everything behind you and follow us and we we'll take care of everything, we will take care of your family. >> reporter: do you think he y felt proud? >> ( translated ): yes, at the beginning, yes, he was veryg, happy, now