The term "patriot day movie accuracy" functions as a compound noun phrase. The core or head noun is "accuracy," which is the primary subject. The preceding words, "Patriots Day" (a proper noun for the film title) and "movie" (a noun acting as an adjective), serve as modifiers that specify the context. Therefore, the phrase refers to the degree of factual correctness and fidelity to the historical record of the 2016 film Patriots Day.
An analysis of the film reveals a high degree of procedural and chronological accuracy regarding the main events of the 2013 Boston Marathon bombing and the subsequent manhunt. The film correctly portrays the timeline of the explosions, the identification of the Tsarnaev brothers from surveillance footage, the murder of MIT Police Officer Sean Collier, the carjacking of Dun Meng, and the final shootout in Watertown. The depiction of key real-life figures, such as Police Commissioner Ed Davis and Watertown Sergeant Jeffrey Pugliese, is largely faithful to their actual roles. However, the narrative deviates from strict factual representation through the use of a composite character, Police Sergeant Tommy Saunders (played by Mark Wahlberg). Saunders is not a real individual but an amalgam created to represent the experiences and perspectives of multiple Boston police officers, serving as a unifying narrative device for the audience.
This use of a composite character is a deliberate narrative choice to streamline a complex, multi-faceted investigation into a cohesive cinematic story. While this element is a significant departure from literal fact, the film is generally considered to achieve a high level of "emotional truth" and respect for the real events. The filmmakers prioritized capturing the spirit of the city's response, the intensity of the investigation, and the experiences of the victims and first responders over a purely documentary-style reenactment. Consequently, its accuracy is best understood as being high in its depiction of the event's sequence and operational details, but with dramatized and consolidated elements for narrative impact.