Does "Sensitivity" or "Diversity" training for bad employees or cops, actually work?

You’ve read these types of articles before, but here’s another one: http://news.yahoo.com/s/ap/20091113/ap_on_re_us/us_trooper_troubles

In that article, a police officer wrote a horrible email containing some valid, some not, but mostly racist diatribes. He meant to send it only to himself for later editing and forwarding to friends only. But he accidentally sent it out in a mass e-mail to his entire department.

And now… he’s going to be ordered to take “Diversity Training”.

Does anyone actually think, or know, that this works?

It seems to me that a Bad Seed is a Bad Seed. You cannot make a bad person good through sensitivity or diversity training. It seems to me that if a cop, or employee, has proven himself to so stupid… that he actually has ardent racist beliefs… then there’s usually no hope for that person, isn’t there?

Isn’t diversity training a nice way of retaining evil individuals in the workforce while pretending to solve the their problems?

How could this cop possibly ever be trusted again? And yet he will be trusted again by his superiors after he completes his so-called training. And this is how it usually goes.

Anyone ever see any evidence otherwise?

And a less-extreme, but similar example would be Customer Service Training that corporations sometimes hold. Can this type of training of common sense things actually convert a sloppy, careless person into an efficient, empathic person?