I don't know this call and I want them to stop

Send me a text stating that there is a lawsuit against me and there is also an arrest warrant.

I got the same text message today from the same number!!!

I keep getting a call from this number stating they have a lawsuit filed against me and an arrest warrent in my name.  I have replied back "STOP" but they continue to message me.  What can be done to resolve this matter?

Do not respond to unwanted texts or emails from questionable sources. Several mobile service providers (including ATT) will allow you to report unwanted spam texts by simply forwarding them to 7726 (or “spam”) to enable the providers to prevent future unwanted texts from the specific sender.

TIP:
Put 7726 in your contact list, so you can easily forward those unwanted texts!

Source:
http://www.fcc.gov/guides/spam-unwanted-text-messages-and-email

More info:
http://en.wikipedia.org/wiki/Mobile_phone_spam
http://blog.usa.gov/post/89152807112/protect-yourself-from-text-message-spam

However, in many cases, the text origin, as seen on your phone, is faked.  The internet domain does not exist, or the phone number may have been spoofed.