As a commercial driver I see lots of drivers displaying suicidal behaviour everyday. Speeding, driving one handed with a phone to their ear, swerving lanes without signals, ignorant of driving rules, eating, smoking and under the influence. I do not find it curious that a stressed oil man under indictment might have lost control of his vehicle because of any of these behaviors. Its also just as likely that he momentarily yielded to that stress, but there is no evidence to indicate it was suicide. Its weird to see so much enmity and conspiracy over this guy. Rich guy exposed as subject to the same greed and incompetence as the general population. Nothing new here.
We all see potential Darwin Award winners driving every day, but they are not under investigation that could lead to prison time and their family losing everything.
Timing and perception. 24 hours after being indicted just give the impression that he took the easy way out. He just didn't swallow his gun, hang himself, or do a sidewalk swan dive. He wouldn't be the first, and wouldn't be the last.