"More than 5,300 violent assaults have been misreported since 2006..." in Milwaukee.

"An internal department audit shows that 20% of aggravated assaults were underreported as lesser offenses that didn't get counted in the city's violent crime rate during that time."

"This is the highest error rate I have ever heard of," said Samuel Walker, criminology professor at the University of Nebraska-Omaha. "A genuinely independent audit of the department is necessary."

Mayor Tom Barrett praised the department for being transparent about flaws in crime data.

"While there were errors in total crimes reported to the FBI, the Police Department's analysis shows crime trends previously reported are correct," Barrett said. "Milwaukee is a safer city."

Barrett, you will remember, was the Democratic Party's candidate in the recall election against Scott Walker.