what about richard buckland? this is his dna profile here and here. the semen profile. conclusion, both girls had been raped and presumed to have been murdered by the same man and that man was not the prime suspect richard buckland. >> the result shocked the police. >> it was a blow to us. >> they basically didn't believe a word we were saying. that was quite right. healthy skepticism of an entirely new technology. we did retesting. it was done independently all pointing to the same conclusion, namely that buckland was not the guilty part party in the case. >> after four months in custody richard buckland was released open became the first person in the world to be exonerated of murder through the use of dna profiling. >> i had no doubt whatsoever he would have been found guilty had it not been for the dna evidence and jailed for life. that was a remarkable occurrence. >> but why did richard buckland confess to a crime he didn't commit? >> the pressure started getting really hard. >> he had to have discovered the body himself. in the terms of his disc