Same thing happened to me.  They are convincing but when they ask to send western union to the Dominican republic I knew it was a scam.

I got a phone call from this number saying that I was gonna be indicted for drug charges and arrested within the next 24 hours. I was also told that a search and seizure would be issued for my property and residence. I went into hysterics and called my lawyer and he advised me that this was indeed a scam. I contacted the real DEA and they told me that there was nothing they could do because I was never asked for money. He told me to make a report with the local police if the phone calls continued.
After finding this out, I continue to call this number back because I have choice words, but no answer. *crickets* hmmm.... Scumbags.

I got a call today from someone calling themselves Commander Brian Collier  right.... said he was a DEA agent.  This is the third time I have received these types of calls.   We need to warn everyone so no one falls for this scam.

3-1-12
I just received a call from the above 301 number telling me they had a warrant for my arrest.

Really, catch these folks.

A man impersonating a federal marshal said he was conducting an investigation into the illegal purchase of drugs on the internet. He said he had a bench warrant for my arrest as well as a search warrant for my office. I am sick snd tired of these extortionists. I have been getting these calls for years.

SCAM Caller     301-358 0949

# 301 358 0949....officer Brian Scum bag!!!  Fraud.......wish they could be caught!!!  Really a stupid man!!!!  He hung up when I told him I was checking out his phony 301 phone number!!!!!  SCAM    Scam!!!!!!!!!!!!!!!!!!!!!!!

Receivedb message from this number and the message stated investigation of purchasing illegal drugs. I have no idea who these people are and I am reporting as a scam.

Got same type of call  as one above.  Said he had a bench warrent for my arrest and FBI involved. He and a woman who had a message on answering tape when I called are impersonating police officers. He told me I had his credentials in message he left and now he has mine.  Of course this is all baloney.  I hope they get caught.  These people are very bold in what they are doing. Never said what they wanted from me other than arresting me so far.

received a vm from commanding officer brian collier dea district 5 to call back regarding investigation of illegal purchase of pharmaceuticals via phone call back number 301 358 0949. did not call back. if he calls again will tell him that i have reported this number as scam. the more people that do this the quicker we can put an end to these extortionists.

Got a call from this number and they said I had to send $1,671 to Vladimir Tejeda or Federal Marshall are on the way to pick me up and send me to The Dominican Republican for trial because I was dealing drugs and I had no proof that I am not guilty of these charges.  Local police just laughed and said there is nothing that can be done because I did not send the money