No details about what particular behaviors sent Matt Lauer‘s career crashing into the rocks, but former MSNBC anchor Keith Olbermann tweeted this morning that NBC knew about Lauer’s sexual misconduct prior to getting whacked yesterday and that the network had chosen to “enable” and “bury” the issue rather than take action.

“Matt Lauer was [remorselessly] vindictive and tyrannical to everyone at NBC News and management repeatedly enabled him and buried the issue,” said Olbermann tweeted.

TMZ “sources” have said that “virtually everyone at NBC was in the dark that Lauer was on the chopping block.” And yet, TMZ says, “NBC had [allegedly] been investigating Lauer for weeks and wanted to get ahead of The New York Times and Variety, which were preparing stories on Lauer and alleged sexual misconduct.”

The woman whose complaint triggered Lauer’s firing and her attorney met with NBC Human Resources and legal depts. on Monday, 11.27 at 6 pm, during which time she officially vented. A Variety report says that Lauer was quite the hound within his realm.

At the same time Prairie Home Companion creator-headliner Garrison Keillor, 75, has been cut loose by Minnesota Public Radio, but the term in this instance was “improper conduct,” or allegations of his “inappropriate behavior with an individual who worked with him,” according to a statement from the radio network. The AP quoted Keillor saying that he’d been canned over “a story that I think is more interesting and more complicated than the version M.P.R. heard.”