"Someone who was staying at my house left the door open and I'm thinking maybe she tried to chase after a cat and then got too far, like, 'Where am I?'" Williams said in a phone interview with The Record from the road Tuesday. It was the first time, Williams said, that Cass had ever left her side, much less run away from home. "She's usually on me 24/7," she said. The search for Cass begins In the hours following, Williams and a group of friends canvassed the neighborhood looking for Cass. Soon after, they began posting signs about the missing German shepherd across St. Augustine Beach, eventually expanding out to the surrounding area.