What is the insulin company scandal?

Can you elaborate on the insulin company scandal? I've heard rumors about unethical practices and price gouging, but I'm not entirely clear on the details. Was it a case of a monopoly abusing its power? Or was it something more sinister, like falsifying test results or putting patients' lives at risk? How did the scandal come to light, and what were the consequences for the company and those involved? I'm interested in understanding the full scope of the issue and its implications for the industry as a whole.