Daimond is looking at developing its own aircraft diesel engine as an alternative to the Thielert engine, as a result of of the Bankruptcy of the engine manufacturer, and Cessna has delayed its turbodiesel Skyhawk.
I’m still not sure what was involved, the founder of the company was terminated for some sort of accounting shenanigans, and I’m not sure what, though some of the comments in the various aviation fan boards there are indications that the company was getting hosed by warranty claims.