J'ai besoin que quelqu'un me corrige ce texte d'anglais

Where : The film his located in the region of San Francisco (San Francisco Bay)
When : This film take’s place around the 1960s and 1970s.
Who : In the film there are 2 cops (Mark Ruffalo and Anthony Edwards) , 1 serial killer his name is Zodiac,(Richmond Arquette) , 1 journalist (Robert Downey Jr) he is trying to solve the Zodiac puzzles.
What : The film, based on real-life events around San Francisco Bay Area, traces the investigation into the killer Zodiac, a mysterious serial killer that hit the San Francisco area in the 1960s and 1970s.
On July 4, 1969, the day of independence, two young adults were shot dead between the cities of Benicia and Vallejo, California. A man contacts the local police and announces that he has committed the crime.
The San Francisco Chronicle, one of the city's leading newspapers, then receives a letter in which he asserts the murder, along with two other dailies in the area. The alleged assassin, who comes under the pseudonym Zodiac, accompanies his request for an enigma. Robert Graysmith (Jake Gyllenhaal) is a young cartoonist of the newspaper. His life changes when he begins to decipher this enigma, driven by his passion for riddles. He then "investigates" more deeply with Paul Avery (Robert Downey Jr.), specialist in criminal cases in the newspaper. In parallel, the inspectors in charge of the investigation, David Toschi (Mark Ruffalo) and William Armstrong (Anthony Edwards), are doing their utmost to end the series and cross-check the multiple information. For many years, the Zodiac has been playing police and journalists with riddles, real and false statements, televised calls and unidentified murders.

why I chose this film?
I chose this film because it's based on a true story and because it’s interesting