Inside the Division: how a small team of US prosecutors fight decades of shocking injustice

Part one: In New Orleans, a man pleaded his innocence for 28 years. Was there evidence that could set him free?

In June of last year, assistant district attorney Bidish Sarma sat before a pile of paperwork, more than 1,500 disorganized pages tall, rummaging for answers.

It was a second-degree murder case file dating back to 1993, which had been in the possession of the New Orleans district attorney's office for almost three decades. Its secrets had gone untold until now.