Who called from 7738394971

It's the old IRS is filing a suit against you scam

They just called my 12 year old's phone saying they were the 'internal revenue service'---I'm sure my unemployed 12 year old doesn't owe the IRS anything.

morning of June 7, 2017 received call from this number, leaving a message that "IRS is filing a lawsuit against you..."  Obvious fraud.

Same thing as above.  IRS supposedly has a lawsuit being brought against me.

Ditto, same scammer "Mark Dawson" claiming to be IRS Officer. Told them put it in writing and in the US mail. See if they want to commit mail fraud too.  Then hung up on them.