Many MD's are specialists at preparing a company for sale. They are engaged by boards specifically to do what is necessary to get the best possible price. The changes are rarely good for long term health of the company (or its staff) so such MD's are not usually kept past the sale.
In my experience once a sale is effected the buyer quickly finds out the layers of smoke and mirrors employed....if the MD is smart he has already exited stage left by that time....
Seems Mr Killer was one such MD.