A person I know cheated through most of their science classes while an undergrad. They literally had someone else take the exams, write reports, and do most of the homework. They then took their stellar GPA and not so stellar GRE score and got admitted to a not so great PhD program.
A new significant other at grad school wrote a lot of their papers. This person ingratiated themselves with the head of the department – they are a schmooze king. They gained favor by doing physical work that very few of the other grad students would do. Their doctoral thesis was weak and the defense round wasn't difficult. They were awarded their PhD. Mind you, they still can't explain to me nearly anything about basic chemistry, organic chemistry or biochemistry concepts. I'm talking like sn1, sn2, benzene rings, buffers, etc...
This person now has a job with a pharmaceutical company doing anything but real science. They're basically a pharmaceutical rep out selling drugs to various physicians in a territory.
Do I tell their employer? Do I tell the university? Do I let it go? I have no way to prove anything. I'm sure none of those people that took the tests in their place will come forward and tell the truth. This has gotten away with fraud.