this is a scam.  No law enforcement agency would ever call to request money or even call to let you know of a pending arrest.  Do not fall for this scam.  The DEA knows about it and is trying to spread the word to as many people as possible.

Just received the same call. I was told I had police outside my "address", which he refused to identify. As soon as I smelled a rat, I had "phone problems" hung up and wouldn't answer the phone again. As stated above, law enforcement wouldn't notify anyone in advance, and tell me I was going to receive a copy of the subpoena in the mail and the I was facing racketeering charges. They couldn't even identify the correct agency! Both men also had "thick" Latino accents. I immediately Googled the phone number and found this site.  I traced the number to Palo Alto, California, not where the "officer" told me he was located.

More than likely this is a foreign "online phone" user in Central America or the Caribbean or Central America. Almost a year ago, I had a similar call who also wanted a Moneygram or Western Union sent to the Dominican Republic. They also had very thick Latino accents.

NOTE - They just called me again a few minutes ago, and I told them the Feds were tracking him down, and they are aware of the 650 area code. I told him the appropriate Federal agency would be contacting him. He hung up. Definately a scam!

I just received a phone call today, on my cell from a man with a very thick Latino accent, claiming to be a DEA Agent, and he went as far as to announce a badge number, claiming he issued a subpoena ect... I was laughing at first. But shortly became irratated by the accusation and harassment.

I JUST received a call, very similar to what the other posters experienced, and I got furious!  I was accused of smuggling something from the Dominican Republic (if you knew me you'd know how ludicrous this is..), but they didn't get as far as asking me for money.  I think I would have come through the phone.  
When I told the man that he obviously has the wrong person, he threatened me with arrest, subpoena, etc. and told me he'd see me in court.  
I think telling them that the Feds were tracking them down was a great idea.  I would really like to report this somewhere.  Any ideas??  Some poor soul is going to send these thieves money.  Where can this number be reported??? This kind of nonsense shouldn't be allowed and sure can't be legal.

i received the same call from a woman with a thick latino accent claiming to be the dea agent. The first time I just pushed some buttons and listened to hear if she said anything.  I heard her say something so i hung up.  She then called again and left a message. She said "This is Elizabeth braxton calling with the dea.  She said I hope u did not just hang up on me.  Please call me back."
I googled as well and found this.
Scarry but so glad i found some relief knowing a scam it is.