Caller left two electronic voice mail messages indicating I have been named as primary subject in a CRA legal case, and urging me or my "retained attorney of record" to call this hot line number, or an arrest warrant will be issued in my name.

There is a widespread IRS (or CRA) or "tax scam" being  practiced by scammers on both USA and Canadian residents.

USA tax payers, click on the "USA Information" button, below, for lots of information and a reporting site.

[spoiler=USA Information]

USA tax payers should read this:
http://www.irs.gov/uac/Newsroom/Phone-Scams-C ... 5-Filing-Season

Short answer:
The IRS never initiates a contact via phone.
They always send a snailmail first.

If you were contacted by an IRS impostor, you may file a report, after clicking on this link:
http://www.treasury.gov/tigta/contact_report_scam.shtml

Recent news story:
http://www.wltx.com/story/money/2015/03/12/fa ... -scam/70202814/

Congressional hearing:
http://www.nbcnews.com/business/taxes/tax-imp ... hearing-n341906
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Canadian tax payers should read this:
http://www.cra-arc.gc.ca/nwsrm/lrts/2013/l131210-eng.html

This scam is also described as scam #11, here:
http://phonehelp.2truth.com/facts.html

These clowns are also using 1 844 380 1608 and trying to pull the same Sh--..... just call them back about 100 times a day then they have to change the # as we are spamming them to death...

I got two messages, 1 electronic one and the other voice mail from what seems like a heavy accented guy, ask to call this phone number otherwise the account will freeze and that will have warrant against me from RCFB?????