I just got the same call. They have an arrest warrant and a search order for my house. Then told me the DEA wants to arrest me and I will be charged in federal court or I can pay the Dominican Republic a fine.
THIS IS AN EXTORTION SCAM. Scammers pretend to be law enforcement (police, sheriff, Feds, AG's Office, fake cop agencies with made-up names) and may be using bought/hacked/phished loan application data to extort money or personal info for fictitious crimes.
The real DEA warns about fake-DEA extortion scams here http://www.justice.gov/dea/pubs/states/newsrel/2010/denver111010.html
The real FBI warns about payday loan extortion scams here http://www.fbi.gov/news/pressrel/press-releases/paydayloanscam_120710
The real FDA warns about fake-FDA extortion scams here http://www.fda.gov/NewsEvents/Newsroom/PressAnnouncements/2009/ucm195814.htm
The real FDIC warns about fake-FDIC extortion scams here http://www.fdic.gov/news/news/specialalert/2010/sa10131.html
Report to the Internet Crime Complaint Center http://www.ic3.gov/complaint/default.aspx , the Federal Communications Commission http://esupport.fcc.gov/complaints.htm , the Federal Trade Commission https://www.ftccomplaintassistant.gov/ and your state AG, as appropriate.