This documentary is about freedom: the desire for it; how it can be denied; and how people will fight to help ensure it is granted.

West of Memphis tells the story of the campaign to free the West Memphis Three. Damien Echols, Jason Baldwin and Jessie Misskelley were all teenagers when they were sentenced for the murders of Christopher Byers, Steven Branch and Michael Moore - all of whom were eight-years-old - at Robin Hood Hills in West Memphis, Arkansas in 1993.

The documentary goes into great detail in its reconstruction of the various twists and turns of the case as the three sought freedom from their life (Baldwin and Misskelley) and death (Echols) sentences.

Most interestingly, as the case became more well-known, the supporters of the West Memphis Three mushroomed to become the first crowd-sourced criminal investigation as evidence was sought to prove the three men's innocence.

The access to the parents of the murdered children, archive footage, interviews with the West Memphis Three, and their legal team, provide an astoundingly rounded view of the case, which cannot but impress the viewer.

In addition to the testimony and interviews, the detailed forensic evidence provides a thorough scientific breakdown that lends truth, credibility and ballast.

Stylistically, the film is beautifully shot throughout by Maryse Alberti and Ronan Killeen, while the editor Billy McMillin marries the different footage expertly as he weaves between the past and the present.

Add in the direction of Academy Award-winning documentary director Amy Berg, and original music by Nick Cave, and you have a superbly made film, with spectacularly engrossing subject matter.

Tadhg Peavoy