In-Motion Outtake: On The Way To Meet Its Maker?

Hearse in Houston

Found this on the road near Houston TX, but had trouble getting closer to take a better picture of what appears to be a hearse on its way to meet its maker? Or perhaps a funeral home hit hard times (or bit the dust!) and sold it down the river.

Hearse Hauling, a closer look

This appears to be a Cadillac-based hearse.  I looked up the current models for S&S, Superior, and Eagle and the rear door and side panels look too plain for any of their offerings.  Anybody care to hazard a guess as to the manufacturer?