Result? A public image of a guy who simply performed extremely poorly at his job of prosecuting cases.
What are
you talking about? His image if he sabotages the case is that of a hero who manages to beat both the feds and the national liberal media and keep down those uppity blacks, while protecting the people who did nothing wrong except make the world a bit better by putting a thug who had just committed a strong-arm robbery and was nothing but a violent criminal into the ground.
His image if he pushes the case and the officer gets prosecuted is that of a traitor to his constituency who bowed to federal pressure and the demands of a bunch of violent looters.
Explain how being a bad prosecutor results in stronger re-election chances for district attorney.
Because in the eyes of his constituency, losing this case makes him a GOOD prosecutor, and winning it makes him a bad one. Winning it means he's soft on crime and will punish police officers for doing their jobs, losing it, intentionally, visibly, means he'll protect our boys in blue in their mission to rid the streets of the criminal element.
Also, from a purely non-democratic standpoint, he's a prosecuting attorney. His career rests on being cozy with and working with the cops, and if the chief doesn't want his boys to be found guilty, why would he jeopardize his power by opposing them?
Remember, this guy has had this job forever. Previous incidents include:
In 2001, two undercover officers fired 21 shots, killing two unarmed victims. McCulloch elected not to prosecute the shooters, and drew controversy when he said of the victims: "These guys were bums."
(After which he was re-elected with ease)
This is exactly the sort of behaviour the people in Saint Louis County want.