Modern science

 Modern science and DNA evidence has helped free people from jail and death row.  What an unimaginable nightmare it must be to get thrown in jail, even though your incoccent, and be placed on death row.  Ronald Kieth Williamson spent eleven years of his life in jail an incoccent man and walked out just five days before he was exacuted.  No one can ever give him those eleven years of his life back, but he was fournate that with new DNA evidence he was freed.  Unfortuntly, not everyone was as lucky.  This is very disturbing to think that this could actualy happen to someone and not just in the movies.