A horrible injustice. Magnitude of the miscarriage of justice. Now hes in prison again for the haunting murder of a young photographer. Did he do it . Tonight, inside the debate datelines followed for a decade. Is the evidence what it seems . Your theory is that the key was planted. Yes. By the police by someone. Nothing about this case suggests that anything of the evidence was planted. Do you think you have new evidence that could free steven air . We do. Rare and revealing interviews. Here from both sides. Now that hes aware that theres new testing, hes thrilled. A savvy, experienced criminal. Steven averys guilty. Im lester holt, and this is dateline. Heres andrea canning. Reporter its this years first bingewatching phenomenon, true crime documentary on netflix. I dont think anybody really thought that it would have this kind of impact. Reporter the 10part series, dense with details, has inspired online sleuths, white house petitions, and its share of controversy. Steven averys gui