The Engineer is a gripping 2013 documentary film centered around El Salvador’s only criminologist working in active field investigations, Israel Ticas. Co-directed by Roberto Hernández and Geoffrey Smith, the film is a nerve-wracking expose of one man's devoted and relentless determination to uncover the truth submerged in the culture of violence and crime that engulfs El Salvador.

The title of the film, ‘The Engineer’, is the moniker given to Mr. Ticas due to his extensive knowledge and innate ability to piece together the gruesome jigsaw puzzles left behind by brutal, murderous gangs. The Engineer, however, does not refer to an individual engaged in traditional engineering but uses it as an apt metaphor for a man meticulously rebuilding the lives lost in violence by discerning their narratives from scattered human remains carefully unburied from clandestine graves.

Israel Ticas, the eponymous Engineer, is an extraordinary figure. As El Salvador's lead forensic criminologist working for The Supreme Court of Justice, his job literally involves getting his hands dirty in El Salvador's gruesome underworld. Ticas is accountable for locating and exhuming bodies of victims of gang violence who have been missing for months or even years. Although having training in IT systems, Ticas is self-taught when it comes to forensic excavation, working tirelessly to ensure justice is served to countless victims whose lives have been prematurely snuffed out.

Throughout their filming, directors Hernandez and Smith stay by Ticas’ side, recording his nerve-wrenching work in stunning, haunting visuals that offer an unsettlingly raw view of the energy and dedication Ticas puts into his work. In the film, Ticas is not portrayed simply as a crime scene professional who does his job and leaves – he is shown to connect and empathise deeply with the families of victims, often finding himself as their only source of hope in their quest for justice.

The central narrative of the film is the case Ticas is working on: a bus driver and his teenage daughter have been missing for over a year. While the film presents other aspects of Ticas’s work, the threads of this case run like a chilling backbone throughout the film. The tangible devastation of the family of the missing drives Ticas and pushes him to his limits, powering the narrative forward and heightening the atmosphere of suspense.

Another crucial aspect portrayed in the film is the dangerous setting of El Salvador, which is one of the most violent countries globally, dominated by gang crime. The directors do not shy away from revealing the horrifying realities of its terrifying gang culture, often showing chilling graffiti-laden walls which serve as a tragic testament to countless lives lost. The film also brings attention to the challenging and impoverished circumstances in which many Salvadorans live - a factor contributing to the unavoidable cycle of violence.

Throughout this bleak landscape, Ticas comes across as a beacon of hope, handling the weight of numerous families' expectations and their quest for closure. The film balances successfully between a crime thriller and a poignant analysis of criminal psychology, gang warfare, and their impact on the society that lives in constant fear.

The Engineer successfully marries the cinematic visuals with a documentary's sobering reality, resulting in a harrowing, moving, and unforgettable insight into a harsh world where the lines of good and evil become blurred. Ticas's unwavering dedication, resourcefulness, and humanity shine brightly throughout the film, offering a glimmer of hope in an otherwise oppressive and violent world. A must watch for those interested in crime documentary, The Engineer offers a heartfelt and genuine window into the raw emotion and brutal realities of gang violence and the struggle for justice in El Salvador. It's a testament to the undying human spirit in the face of unrelenting violence and despair.