The callousness of it is truly shocking. Security cameras shows what appears to be a young women stepping out of her car with what looks like a plastic bag and throws it onto other plastic bags containing rubbish. This is an area where the public can throw away trash. This happened in 90F Coachella heat (California). They would have died within the hour if they were not saved by a passerby who spotted the bag.
You won’t get a clearer example of treating companion animals as trash. She must be found and punished. By sheer chance the puppies were saved and are at a shelter.