Mr Loewentritt said Mr Beckler did not make a commitment to the transition team that requests from law enforcement for materials would be routed through transition lawyers.
The letter, written by Kory Langhofer, counsel to the transition team known as Trump for America, Inc. He said the agreement was laid out in June before a lawyer at GSA, Richard Beckler, a Trump appointee, who has since died.
"When we have obtained emails in the course of our ongoing criminal investigation, we have secured either the account owner's consent or appropriate criminal process", Mueller spokesman Peter Carr told CNN.
"As the White House has consistently said for months, there is no consideration of firing the special counsel", Mr. Cobb said.
While there's nothing yet to indicate whether there was anything explosive in those emails, the administration is clearly spooked.
"The President's lawyers have said they want to fully comply with Special Counsel Mueller's investigation, so it is odd that they now suggest they would have withheld key documents from federal investigators".
"Additionally, certain portions of the [transition] materials the Special Counsel's Office obtained from the GSA, including materials that are susceptible to privilege claims, have been leaked to the press by unknown persons".
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Upon entering the game, Yates threw a touchdown pass to DeAndre Hopkins to narrow the gap against the 49ers. Savage missed the Texans' wildcard game against the Oakland Raiders last season because of a concussion.
"I was at dinner last night with the President and Vice President".
Langhofer argues in the letter that decision by GSA officials went against what he calls "the GSA's previous acknowledgement concerning" the Trump campaign's "rightful ownership and control of" transition team materials. "Future transitions will have to re-examine this relationship", he said.
The latest complaint against Mueller comes amid a barrage of criticism from Trump allies that the special counsel investigation itself is tainted on multiple fronts.
The recent revelations about Mueller's top investigator expressing partisan sentiments against Trump don't help Mueller's case one bit.
Among the officials who used transition email accounts was former national security adviser Michael Flynn, who pleaded guilty to a count of making false statements to FBI agents in January and is now co-operating with Mr Mueller's investigation. That followed criminal indictments against Manafort and Gates on charges that include money laundering and tax evasion. What are they afraid was found? "Baloney. This is another attempt to discredit Mueller as his #TrumpRussia probe tightens", he wrote on Twitter.
I have to say that there would be something ideal about this - a special counsel investigating, in part, the circumstances that led to his appointment would be fired, perhaps leading to an impeachment about the circumstances of his ouster.
Mr. Trump said he was "quite sad" to see Mueller had obtained the emails but doesn't think they contain any incriminating information.