- “Not in my town you don't!”
- ―Sheriff seeing Lightning McQueen driving past the speed limit
Sheriff was first seen when Lightning McQueen enters Radiator Springs where he notices McQueen speeding when trying to catch up with Mack. There, Sheriff tries to stop him but eventually evades him as McQueen ends up in the town of Radiator Springs. He then arrests McQueen for causing too much damage to the pavement.
Sheriff next appears when he tells Mater to take McQueen to the traffic court to know who is responsible for damaging the pavement in which he presents the town's judge Doc Hudson in which McQueen must pave asphalt on the damaged road. After the plan to repair the damaged road was unsuccessful and rushed, Sheriff then later appears challenging McQueen and Doc in a race at Willy's Butte in which the race was unsuccessful due to McQueen crashing into cacti.
Later when McQueen meets Sheriff having an appointment with Doc Hudson, he asks Doc to get daily gas ration from him, in which Doc explains that he can talk to him after his appointment. Meanwhile at Flo's V8 Cafe, Sally gives gas to McQueen in which he feels worried that McQueen may cause trouble again. When McQueen plans on winning the Piston Cup and then get promoted to Dinoco, Sheriff plans on giving McQueen a police escort, but McQueen decides to get tires to help prepare for the race as Mack and the other fans find McQueen and take him to the Los Angeles International Speedway. Sheriff and the rest of the town leave to go to the speedway except for Red, Sally, and Lizzie who watch McQueen's race on TV in Radiator Springs. There, he and the other inhabitants watch McQueen racing in which McQueen did't win and later Chick Hicks getting booed off for his notorious actions. During the epilogue, the Delinquent Road Hazards pass through Sheriff who is sleeping as he arrests them for speeding and as a punishment, the group is forced to use Bessie to pave the damaged road.
Sheriff tells the townsfolk the story of the ghostlight, which scares the townsfolk, especially Mater. He and the other townsfolk later to play a joke on Mater to get back at him for his pranks. They hang a lamp on his tow hook, which scares him all over Carburetor County. When Mater finally sees the lamp, Sheriff tells him that the only thing to be scared of is his imagination.
In Tokyo Mater, when the tuner cars drift through Radiator Springs, Sheriff chases after them. In Hiccups, he suggests drinking water as a cure for Lightning's hiccups. After Sally cures them with a kiss, Sheriff gets the hiccups himself and drives away when Mater tries to cure them by kissing. He is also seen in the crowd of cars watching Guido dancing with the sign in Spinning, and joins in on the leisurely drive for the "Staney Days" celebration in The Radiator Springs 500½.
He would have been a main character in the cancelled episode, To Protect and Serve in which he takes a vacation while two rookie police cars fill in for him in his absence. He eventually returns when he senses, correctly, that the rookies are doing a bad job.
Sheriff is the local law enforcement and the keeper of the peace in Radiator Springs. He takes his job very seriously. Sheriff enjoys telling stories and taking the occasional nap behind the Radiator Springs billboard. That's where he was when Lightning McQueen first zoomed into town years ago, which led to a messy car chase that didn't end well. These days, Sheriff welcomes the hotshot racer Lightning home to Radiator Springs with all four tires.
In the film, 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.
Sheriff returns in Cars 3. He is seen in Radiator Springs saying goodbye to Lightning when he leaves for the Rust-eze Racing Center. He watches the Florida 500 on television at Flo's and participates at the exhibition race between Lightning and Cruz at Willy's Butte.
In the third chapter, Lightning goes to see Sheriff at the billboard where they talk about the chase they had. He takes this as a challenge to a re-match and "accepts" it. Lightning wins, despite Doc having giving Sheriff a turbo-charger, and celebrates his victory by doing doughnuts. Sheriff sends McQueen away, threatening to make him do trash pick-up.
Sheriff is playable in Sheriff's Hot Pursuit in which the player has to chase down three speeders until their meters run empty.
After being robbed by the Delinquent Road Hazards, Mack calls Sheriff to report the robbery. Sheriff tells about it to Lightning, who speeds off to the Interstate to get his stuff back. They are caught and sent to the impound where they confess to Sheriff and Lightning that they were recruited by Chick Hicks.
In Speed Trap, the player controls Sheriff and chases down the tuners and Chick Hicks down the Interstate and pull them over to get them arrested. He also appears in Fill 'er Up as one of the customers the player must serve.
Early on in the story, Sheriff catches Otto for doing 120 in a 25 mph zone. Lightning shows up and decides they all should have a race. After the race, Lightning sends Otto to Lizzie's to keep him out of trouble, much to Sheriff's relief.
Later, when the tractors stampede through Radiator Springs, Sheriff scolds Mater for going tractor tipping again. He tells him that the ghostlight has been sighted at the tractor pasture, then secretly hangs a lamp on his tow hook.
Sheriff appears in most of the races taking place in Radiator Springs. He is also playable in Sheriff's Chase, a minigame similar to Sheriff's Hot Pursuit from Cars: The Video Game with the speeders being Chick's students.
Sheriff is often seen parked behind the billboard, but he goes chasing after the tuners when they speed into town.
Sheriff can be downloaded and played as on the PlayStation 3 and Xbox 360 versions of the game.
Sheriff gives the safety precautions at Radiator Springs Racers. Later, he appears to warns the guests to slow down after their several near-misses with other cars, then calls for Mater to take them to the town for the race.
- Sheriff is a 1949 Mercury Police Cruiser, fitted with aftermarket "curb feelers" designed to help avoid scuffing his whitewall tires.
- If Sheriff is in London, he's out of his jurisdiction.
- His license plate reads 001, except in the video game, where it reads SHERIFF.
- In newly uncovered concept art for Ant-Man, Sheriff was going to appear in the final battle, having been supersized by Ant-Man had he'd been included as a toy.