This article appeared online a few weeks ago, but again in the print edition of the Community Impact Newspaper that I received today:
Community Impact Newspaper, 12/03/09
Williamson County's tough-on-crime reputation a three-decade legacy
"Williamson County's tough-on-crime reputation has been 30 years in the making and is bringing the county statewide recognition. The county's stance on crime is infused into every level of the county's law enforcement, down to the arresting officer and the juries who hand out the sentences." More: http://impactnews.com/georgetown-hutto-taylor/143-local-news/6354-williamson-countys-tough-on-crime-reputation-a-three-decade-legacy
Local residents have been aware of this reputation for many years, but if you're considering a move to Central Texas, and if active law enforcement is important to you, then Williamson County (Round Rock, Cedar Park, Leander, Georgetown, Liberty Hill, and surrounding areas) should be on your list.
Note that Austin itself also has a low crime rate relative to other metro areas nationwide, but Williamson County has the "rep," and the conviction rate to discourage criminality.