Can we not make a reasonable assumption that whistleblowers against a powerful company have a much higher than average risk of dying? Knowing nothing about them personally we can reasonably conclude:

- They get regular death threats.

- The opposing law firms probably have PIs digging into their lives for dirt to discredit them.

- Their careers in their line of work are over and as far as I know, there's no whistle-blower retirement fund.

- Everyone they knew and worked with for many years and who still works there probably cut them off for fear of being associated with them.

- Because of all this their sleep is probably horrible, they're much more likely to have unhealthy alcohol habits, and to have financial problems.