Rick Wagoner, former CEO of GM
Roger L. Wollenberg/Getty Images

No mystery man.

Who took out GM CEO Rick Wagoner? Detroit Free Press columnist Tom Walsh says he knows. He writes, "Simple math cost Wagoner his job:"

[U]ltimately, when GM's survival was on the line and the Big Banker himself, President Barack Obama, had to decide whether to keep federal loans flowing to GM, the Big Banker didn't find Wagoner's track record reassuring enough.

Walsh says GM has lost $82 billion in the last five years.