the greatest travesty of modern science is that fraud is not illegal.
in every other industry that i can imagine, purposely committing fraud has been made illegal. this is not the case in modern science, and in my opinion the primary driver of things like the replication crisis and the root of all the other problems plaguing academia at the moment.
It's hard to prove when it isn't investigated. How many of the debunked psychology professors took federal funding? How many have been criminally investigated?
my own institution launched an internal investigation into a professor who i know for a fact committed fraud and was "unable to prove intentional wrongdoing". academic institutions have taken the "this never happens because we are morally pure" approach which we all know is a load of baloney, they are perversely incentivized to never admit fraud.
the witness and reportee who i am friends with was directly instructed by this professor to falsify data in a more positive light in order to impress grant funders. multiple people were in attendance in this meeting but even that was not enough to see any disciplinary action.
duke also has a notorious reputation for being a fraud mill.
Note both those guys were found guilty for taking government money under false pretenses (to do with fake science, not for doing fake science, which is more supporting evidence that fake science is legal.