Male with thick foreign accent claiming to be IRS and to call him back to avoid further issues with IRS

got the same as Gary except that the caller wants you to call and another number to contact him! Be aware this is an IRS scammer

This message is on my cell phone voice mail.  The caller has a thick foreign accent so I can't understand the beginning of the call.  The caller may be saying, "You have reached the attorney of ??? and have right to return the call,"  but I can't be sure.  About five seconds into the call, he says, "Issue at hand is extremely time sensitive and very urgent.  This is Officer John Parker and the upline (?) to my position  (or maybe division?) is  301 968 7596.  I repeat for you is 301 968 7596.  Don't disregard this message and do return the call.  Now, if you don't return the call but if I don't hear from your attorney either, then the only thing which I can do for you is to wish you uh very good luck as the legal situation badly unfolds on you.  Till then, take care and have a great day."

Please note that the number the caller gives in the middle of the message is not the number from which he made the call.