In commemoration of the 41st anniversary of Martin Luther King Jr.'s assassination, CNN will be re-airing an installment in their 'Black in America' documentary series titled, 'Eyewitness to Murder: The King Assassination' on Saturday.

News correspondent Soledad O'Brien reports on how convicted criminal and armed robber James Earl Ray spent a year on the run, which included plastic surgery, prior to his assassination of the civil rights leader.

"What's amazing to me is that in some ways you know you're standing literally in a pivotal spot, in history, in time, in this country," she said while standing on the balcony of the Lorraine Motel in Memphis, Tennessee. "There's a chunk of the concrete on that balcony that's literally been cut away because there was so much blood when Dr. King was shot down, they could never get it out. They just cut the concrete out and re-poured it."

Through exclusive interviews with first-person witnesses and investigators, O'Brien retraces the steps of King, Ray and investigators to explore alternative scenarios of what may have happened that fateful day on April 4, 1968.

In addition, Eyewitness to Murder also raises a controversial question that has been on the minds of many, "who is ultimately responsible for the murder of Dr. Martin Luther King Jr.?" The Black in America series takes an in depth look into the million dollar question, in which for some may have meant the end of the Civil Rights movement.

'Black in America - Eyewitness to Murder: The King Assassination' will re-broadcast on April 4 and 5 at 8 PM and 11PM ET/PT.

This July to celebrate a year from its original premiere, CNN will air 'Black in America 2' as O'Brien reports on the innovative and unexpected ways people are transforming the black experience by confronting the most difficult issues facing their community.