CNN CNN Newsroom With Carol Costello January 12, 2016 14:46:00
Supervisor supset. and e has stripped his personality. and i don't know where it's gone and where we've gone wrong but it a's been lost. >> do you blame yourself. >>y think yes there is an element of guilt. i feel why could i not stop it. are we that bad that you have to leave? >> reporter: she desperately wants to believe her brother is not the man in the new isis video. though she's conceded the voices are similar. unable to reconcile that kill we are the boy she grew up with. >> most would say anyone who joins isis on some level is evil, a psychopath, do you believe that to be true about yo...