Detour - Hero or anti-hero

In the film "Detour", the protagonist is a middle aged male hitchhiking in order to make it from New York to LA to see his soon to be wife. Along the way, though, he encounters a few unfortunate situations that leave his standing up for debate; is this character a hero in the movie? Is he an anti-hero?

I believe that the film is portraying the character as an anti-hero. First, when Hesko dies in the car, the character sees an opportunity in the face of fear when he should have seen the event as something to be taken seriously and dealt with in a timely manner. The character decides not only to take Hesko's car, but also take his money, clothes, and driver's license to convince others that he is Hesko so that he may keep these items in his possession. The cinematography places further emphasis on the anti-hero status of the character because right when he finds out that Hesko is dead, the dreary rain turns from a drizzle to a downpour. 

The scene where Vera is strangled via the telephone in the hotel room also suggests that the character is an anti-hero rather than a hero. This is because of the fact that this time, the character actually did commit the murder. The film suggests that the character did not mean to commit the murder. However, the situation he was in (being kept "prisoner") suggests otherwise. It was a coincidence that this character accidentally killed the person keeping him prisoner by threatening to tell the police that he is a murderer. Once again, the cinematography here has some influence during the murder. Here, the character appears to be intoxicated as is suggested by the bottle of alcohol in the room, and the amount of force and anger the character put into pulling the cord of the telephone under the door seems like it shows the character desperate, and willing to do whatever it takes to prevent him from going to jail.