Criminal Records

Can I find out if I have a warrant for my arrest over the phone?
How can I obtain a copy of my criminal record?
How do I find out if a sex offender lives in my neighborhood?
How often is the sex offenders registration updated?
Where can I find information about crime statistics in Round Rock?
Where can I obtain a letter stating I do not have a criminal record within the City of Round Rock?
Who do I contact if I have questions about the sex offenders registration?