It’s fraud and prevention of a lawful burial that they were arrested for.
So they were not doing what they were paid for. Taking the money and not carrying out the service. That’s a lot of bodies they had.
And clearly if it was a 3am job. They were doing something with the bodies at 3 am which police deemed as an emergency that they had to stop. I’d assume a member of the public saw them and reported. Or someone who knows what was going on at that time.
they were clearly charging for a service. Not doing it. And then trying to dispose of the bodies in a way that was illegal.