There's a long history of law enforcement in Sheriff's family. His father was a traffic cop. His aunt, his two cousins on his mother's side, his little brother...even his grandfather was a traffic cop, directing traffic at Times Square in New York around the turn of the century. Sheriff always knew he too would be a cop. After all, how many other options did he have with a name like Sheriff?
In Cars, Sheriff begins to chase Lightning when he speeds past him on his way to Radiator Springs. After shooting at him in an attempt to make him stop, Sheriff waits until Lightning gets caught in the power lines, and arrests him. The following day, after Lightning tries to escape Radiator Springs, Sheriff and Sally await him, as they lowered his gas amount.
In Cars: The Video Game, he first appears in the minigame Sheriff's Chase, where he and Lightning talk about how Lightning wrecked Radiator Springs not that long before. Then Sheriff thinks Lightning is asking for a rematch, and he accepts it, because Doc outfitted him with a turbo charger. If Lightning wins, he won't be thrown in the impound. If Sheriff wins, Lightning will. After Lightning won the race, Sheriff asks Lightning to stop doing doughnuts, and to go away, or he will be picking up trash on the highway.
In Mater and the Ghostlight, Sheriff tells the story of a mythical vehicle called the Ghostlight, scaring the rest of the town, especially Mater. Deciding to pull a practical joke, he and the other townspeople place a lamp on Mater's tow hook, scaring him all the way around Carburetor County.
Cars: Mater-National Championship
In Cars: Mater-National Championship, he appears with Otto, as he was speeding. Lightning makes sure that Otto stays out of trouble by racing him, along with Sheriff. Sheriff later appears overhearing Lightning sending Otto to see Lizzie, saying that will keep him busy. He then later appears when Mater spots a tractor and was about to tip it, but gets interrupted by Sheriff. Mater says that he's sorry, then Sheriff says that he does not want Mater to go tractor tipping again, and then he reminds Mater of the Ghostlight, which when Mater wasn't looking, Sheriff puts the blue lantern on Mater's hook.
In Tokyo Mater, Boost, DJ and Wingo speed by Sheriff at Flo's V8 Cafe, causing him to take pursuit, which leads Mater into his story about how he was once a drift racer.
In Hiccups, Sheriff receives a case of the hiccups at the end of the short, causing him to run away as Mater tries to cure him by kissing him.
In The World of Cars Online, Sheriff could often be found chasing one of the tuner cars throughout the roads of Radiator Springs.
In Cars: Race-O-Rama, he appears in Sheriff's Chase, which the player has to help him catch some speeders, who are a few of the Chick Hicks Racing Academy students. This is similar to another mini-game in Cars: The Video Game. He is also playable in many other events like races on the console versions.
In Cars 2, he watches McQueen leave for the World Grand Prix. When he is called to London by McQueen he aids McQueen and Mater in fighting the lemons by chaining one of them up just like he did to McQueen in the first film.
Cars 2: The Video Game
In Cars 2: The Video Game, Sheriff is a downloadable playable character that is exclusive to the Xbox 360 and PlayStation 3 versions of the game. He is a medium weight, and has speed and power that are equal to each other.
Kinect Rush: A Disney/Pixar Adventure
In Kinect Rush: A Disney/Pixar Adventure, Sheriff appears in the first Cars level, when Mater has the player try to stay close to Sheriff on the course. Sheriff later appears at the end of the course and in the background of the ending cut-scene.
In Cars Land, Sheriff makes an appearance. At the beginning of the ride, Sheriff is announcing the safety rules in English, while Ramone says them in Spanish. Later in the ride, he pulls you over after you almost crash into a train. You think he's gonna give you a ticket, but really, he's helping you get to the big race. He calls for Mater to take you to the race, and Mater does take you there (by tractor tipping).
Sheriff is easily angered, and quick to threaten someone if they step out of line, as he is the head of the town, making sure everything is in order. However, he does have fun with his job, chasing speeders and fighting crime.
Sheriff is painted black and white, with the Radiator Springs Police Department badge on both of his doors. He has a siren on his roof.