Films today can have a huge impact on society. It can change ideas and thoughts. It can change people's lives. An example of this is the film created by Errol Morris, The Thin Blue Line (1988). Errol Morris, born in 1948, is a highly successful documentary director. The Gates of Paradise (1978); Vernon, Florida (1981); Fast, Cheap and Out of Control (1997); First Person (TV series, 2000); The Fog of War (2003); Standard Operating Procedure (2008), are the most famous documentaries he has made, followed by his latest, The Unknown Known (2013). Errol has also made numerous commercials and short films/documentaries such as They Were There (2011) and El Wingador (2012). Errol Morris graduated from the University of Wisconsin with a BA in History (1969) and owns his own manufacturing company, Globe Department Store. Soon after his first two documentaries, he found himself without any source of income for his projects. He then sought an unusual way to obtain funding, working as a private investigator in New York for six years. His time as a detective helped him improve his investigative skills, which led to his own project called The Thin Blue Line. The Thin Blue Line is an exceptional documentary that dramatizes and reconstructs a crime scene involving the killer of a police officer. Official in Dallas (Texas, USA). Morris becomes interested in a psychiatrist, Dr. James Grigson, known as Dr. Death, whose job was to testify against criminals and analyze whether they would commit further crimes of violence. In almost all cases the doctor would say that they will commit crimes with one hundred percent certainty. Therefore, these criminals would be punished with the death penalty. Through his investigation of the Doctor, Errol Morris found...... middle of paper ......leads the audience to a self-conclusion about what happened in the incredible story of a young man who stole the identity of many children, real or invented. The sham was eventually discovered following the suspicions of a private investigator and an FBI agent. The Thin Blue Line was released in American theaters on August 25, 1988. The documentary made more than a million dollars, helping Randall Dale Adam get out of prison. This documentary is a good example of the influence documentaries have in society, even when they relate to police cases like this. The message that Morris conveys in his film is so powerful that he manages to do what the Dallas Police were unable to do; find the real culprit of the murderer. The killer had, in fact, killed again and committed other violent crimes, ending up on death row under Texas law.