>> reporter: steve, we are now in the era of the terrorist selfie. this video has become ubiquitous in turkey. all day long they've been broadcasting it in the hopes that somebody will recognize him and call authorities. so far, the suspect however remains at large, 14 people in custody to be questioned about possible connections, the big concern is, is there a larger isis network? and many people in this country know that isis has roots in turkey, unfortunately because for the last several years, turkey has been a main transit route for foreign fighters going into syria and coming out of syria. isis has felt comfortable operating here and using this as a transit hub. and for a long time, isis didn't carry out very much attacks in turkey and certainly didn't take responsibility for them, but now, turkish forces are fighting in syria according to to the turkish military. they have killed over the turkish forces killed over 1,000