Complex sentence: Purgatory is an upcoming documentary film and sequel to the true crime trilogy, all of which chronicle the arrest, 18 year imprisonment, and eventual release of Damien Echols, Jason Baldwin, and Jessie Misskelley, otherwise known as the West Memphis 3.
Split into simpler sentences: Purgatory is an upcoming documentary film and sequel to the true crime trilogy,. The three films chronicle the arrest, 18 year imprisonment, and eventual release of Damien Echols, Jason Baldwin, and Jessie Misskelley, otherwise known as the West Memphis 3.