I don't understand how someone can be arrested without first conducting an investigation. They're just taking the word of Hertz that these people stole these ca

I don't understand how someone can be arrested without first conducting an investigation. They're just taking the word of Hertz that these people stole these cars, and they're letting a corporation that is largely unaccountable to the public call the shots of who gets arrested and who doesn't. So what if Hertz says you stole your car? You need to gather proof first. Proof that could never possibly materialize if all you have is Hertz's flawed record keeping.