This is a scam trying to collect on non-existant debts. They are using the "United States Crime Bureau" cover and they state they will be coming to arrest you at your office.
A. There is no Unites States Crime Bureau
B. You can be arrested for ANY debt
C. The have no current information (usually).

I kept answering telling them I wasn't falling for their scam, then playing some VERY explicit rap music, then calling them back to play it for them. After about 15 calls FROM them, and 7 TO them, they started calling from a number that registered as '911' on my caller ID. Now, being that I have worked with the emergency call centers here a few times, I am aware that it is not the police but in fact that scam artist...again!! LMAO - I have found they HATE songs about sex, and they HATE rap!

I received a call at my work stating that David Johnson from the USCB (he was very foriegn) and that he was getting ahold of me due to law suites and that my info would go to court and I would be charged..the number was 813-421-5621 ext 127.  He stated he was a law officer.

they called twice (today) the second time, I got on the phone to tell them they have the wrong number and to take us off of their call list. They told me I WAS the person they were calling and "WHAT was my name!?" I told them IF I was the person they were calling they would KNOW my name. Anyway, he (Kelly Johnson) finally hung up on me. They are a scam and are just trying to find people that WILL fall for their scam. Hang up on them and don't answer their calls, OR ask the questions right back at them that they are asking you (If you can understand them). Don't let them scare you. They are full of crap.

Please do file reports with the FBI, your state attorney general and Department Of Justice,FTC & FCC..

http://www.ic3.gov/default.aspx
http://www.fbi.gov/
https://www.ftccomplaintassistant.gov/
https://esupport.fcc.gov/ccmsforms/form1088.action

Also read up on the laws and your rights:

http://www.ftc.gov/os/statutes/fdcpajump.shtm
http://www.consumerfinance.gov/askcfpb/search ...
http://www.consumer.ftc.gov/articles/pdf-0096-fair-credit-reporting-act.pdf

And see:

http://800notes.com/forum/ta-86217073a9c8dad/ ... 077595690349410
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http://www.consumer.ftc.gov/articles/0258-fake-debt-collectors
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http://www.deadiversion.usdoj.gov/pubs/pressreleases/extortion_scam.htm