In the Houston Chronical article they mention the car doors being locked and seem to imply that was part of why it was considered a suicide. My first thought was, gee, people accidently lock their car all the time - as such it doesn't mean anything just because the doors were locked.
Well, gee, let's say I'm a would-be murderer. I call the guy up and on some pretext get him out to the car, maybe saying something like "we need to talk privately, I'm turning state's evidence", shoot the guy, put the gun in his hand. I thoughtfully depress or flick or whatever that particular car's locking mechanism is and shut the door. Then I test the door to make sure it isn't one of these stupid doors that require you to hold the handle up. If it is, I repeat, holding the handle on the door up. There we go, car all locked up.
Under the circumstances, I'd think an autopsy to check for foreign substances in the blood might be worth doing. Good to see this Justice of the Peace Jim Richard decided (after he initially made the ruling as "an obvious suicide") to order an autopsy.
He retired last May, and according to one report it was to spend more time with his family. He retired with $30+ million dollars. Now, unless he had learned he had incurable cancer or something like that (another reason for an autopsy), does that really fit the profile of a would-be suicide?
Yes, I know, people commit suicide for all kinds of reasons, some which we'd never consider rational. We had one here not too long ago, and I don't think any of us have figured that one out yet. About the only "motive" I can think of is remorse for all the employees who have been screwed over, but from the reports he was probably the only guy in the company who did his best to question and prevent what was going on.
I mean, hell, have they even looked to see if the supposed suicide gun was his? (None of the reports I've seen say anything about that - it would be a point of evidence in favor of the suicide theory.)