They probably didn't like the cut they were getting. Having never met Richards I have heard nothing but negative things about him being most difficult to work with, to put it nicely.
The rumor is that after a year of stealing from the manifest girl the accountant finally brought the books to the owners. There being a totally silent partner involved that finally showed their face and things started rolling. Apparently Richards had taken a loan out against his AC business but also used not just his share of Zhills as collateral but the other partners shares also. As you can imagine this is not legal. So I think with all these things happening within a year or so the owners are trying to make some badly needed changes.
If only they would get rid of the manager and some of the other staff there that make the place so negative it could be a fun dropzone. "The most friendly dropzone"...I don't think so.