>> reporter: people taking on terrorist usman khan, even though he appeared to be wearing a suicide vest, later turning out to be fake. khan was shot dead by police. khan was one of 75 inmates released early from terrorism half of his 16-year sentence. now there's pressure to change the law. saskia jones and merritt, cambridge students, dedicated to helping ex-convicts like their killer. merritt's own family fighting for his legacy, saying he believed in redemption and rehabilitation, not revenge. police believe khan acted aloner reviewing all cases of terrorist offenders released early from prison. david? >> ian pannell tonight. ian, thank you. and now to the interview making global headlines tonight. w're andout acs this photo right here of her in with the prince when she was it