Suspect
Scott is a previous contestant from the Jolly Good Baking Show. Everyone KNOWS that he's a plant because 'obviously, Americans don't know how to bake properly'. He has even rented a local apartment and has spent the summer in Brindlewood Bay to make it more like he's a 'local'.
He was famously dropped from the show after an explosive argument with Paul Rivera during a muffin baking session. Rumor spread by fellow contestant and Silhouette Swap member Melanie has it that he and Paul Rivera were lovers and the argument had NOTHING to do muffins.