Angel Echavarriahas just experienced his first month of freedom in 21 years.

Echavarria was arrested in 1994 and convicted two years later of a murder in Lynn, Massachusetts. He was given a sentence of life without the possibility of parole, but always maintained his innocence.

Then, last month he was released during a bail hearing, after a judge determined the prosecution's case was weak and that his lawyer made errors that could have cost him his case decades ago. 

A few days ago, prosecutors announced they would not re-try him. 

Florence Graves, founding director of the Schuster Institute for Investigative Journalism at Brandeis University, has been investigating this case for the past ten years. 

Graves and Echavarria talk the long fought battle for freedom, and readjusting to life outside of prison. 

"The only thing that bothers me is that they're not apologizing," said Echavarria.