Every parking lot in America does not have a camera. This one is in a large strip center and when I served on the Sugar Land 4B Corp. Sugarland Properties was talking about cameras but the 4B only agreed to retrofit the mall and I don't think any were ever installed. There may be on on the Randall's a few doors down, IF I have the correct PETCO in mind.
Come to think of it, I rather doubt our Petco's parking lot would have a camera. Our PetsMart is in a busy place across from a major mall and would probably have cameras, but our Petco is in a smaller strip center.
I'm guessing there's no video since nothing has surfaced after a week. Here's hoping that making the story public will smoke out the perp.