“That is to inform you that the Division of Homeland Safety Workplace of Inspector Common has an ongoing investigation into the info and circumstances surrounding the gathering and preservation of proof by the USA Secret Service because it pertains to the occasions of January 6, 2021,” DHS Deputy Inspector Common Gladys Ayala wrote in a July 20 letter to Secret Service Director James Murray.

The inspector normal continued: “To make sure the integrity of our investigation, the USSS should not have interaction in any additional investigative actions relating to the gathering and preservation of the proof referenced above. This contains instantly refraining from interviewing potential witnesses, amassing units or taking some other motion that might intrude with an ongoing felony investigation.”

The letter provides to the rising pressure between the Secret Service and the DHS inspector normal over the doubtless lacking textual content messages, that are being sought by the Home choose committee as a part of its investigation into former President Donald Trump’s actions and actions on January 6, 2021.

Inspectors normal within the federal authorities can refer the findings of their investigations to federal prosecutors.

The inspector normal wrote that the Secret Service ought to clarify what interviews had already been carried out associated to the textual content messages, together with the “scope off the questioning, and what, if any, warnings got to the witness(es).” The inspector normal instructed the Secret Service to reply by Monday.

The Secret Service, in a press release, acknowledged it had obtained the inspector normal’s letter. “We’ve got knowledgeable the January sixth Choose Committee of the Inspector Common’s request and can conduct a radical authorized evaluate to make sure we’re absolutely cooperative with all oversight efforts and that they don’t battle with one another,” the company stated within the assertion.

A spokesperson for the Secret Service, “We’re unaware of a felony allegation, however are dedicated to cooperating with the Inspector Common.”

The Justice Division declined to touch upon the reference to an “ongoing felony investigation” within the inspector normal’s letter.

The brand new letter comes after the Secret Service was solely capable of present a single textual content message to the inspector normal, who had requested a month’s value of information for twenty-four Secret Service personnel, in response to a letter to the choose committee.

The DHS inspector normal didn’t reply to a CNN request for remark.

The directive may complicate the Secret Service’s response to a subpoena it obtained from the Home choose committee final week, in addition to a request from the Nationwide Archives this week to the DHS information officer asking the company to clear up if the textual content messages had been deleted and clarify why.

The choose committee’s chairman, Democratic Rep. Bennie Thompson of Mississippi, wrote in a letter to the Secret Service director that the panel was looking for textual content messages from January 5-6, 2021.

In a joint assertion Wednesday, Thompson and committee vice chairwoman Rep. Liz Cheney stated they “have considerations” about how the Secret Service mobile phone information was deleted.

“The process for preserving content material previous to this purge seems to have been opposite to federal information retention necessities and should symbolize a attainable violation of the Federal Data Act,” they stated.

The Secret Service instructed the committee this week that it was engaged in “intensive efforts” to find out whether or not any textual content messages had been misplaced and in the event that they had been recoverable. These steps included “the pulling of any out there metadata to find out what, if any, texts had been despatched or obtained on the units of the recognized people,” the company stated in a letter, in addition to interviewing the 24 people “to find out if messages had been saved in areas that weren’t already searched by the Secret Service.”

The company stated it was “at present unaware of textual content messages issued by Secret Service workers” that had been requested by the inspector normal “that weren’t retained.”

The group of 24 people contains high-ranking officers, a number of of whom remained in a safe location, often called a SCIF (secured compartmentalized data facility) in the course of the day the place cellphones will not be permitted, in response to a supply acquainted with the matter. The supply additionally stated about half of the people are being reviewed to find out if textual content messages had been despatched and obtained and presumably deleted, and what that content material might have been.

Investigators decided that no less than three of the individuals had solely private textual content messages, which they didn’t think about a public file, whereas investigators imagine others don’t have any textual content messages in any respect, the supply stated. The company has produced one related textual content alternate thus far, which it has given to the inspector normal and the committee. The Secret Service instructed the inspector normal final yr that other than the only textual content message, the company “didn’t have any additional information responsive” to the request.

The inspector normal has alleged that the Secret Service erased textual content messages from January 5 and 6, 2021, not lengthy after they’d been requested by oversight officers investigating the Secret Service’s response to the January 6 assault on the Capitol, in response to a letter that the inspector normal despatched to the Home choose committee.

The Secret Service has beforehand defined that it was as much as workers to conduct the required preservation of information from their telephones. The letter stated the service did present personnel a “step-by-step” information to protect cell phone content material, together with textual content messages, previous to the telephone migration that started January 27, 2021. It went on to elucidate that “all Secret Service workers are chargeable for appropriately preserving authorities information which may be created through textual content messaging.”

This story and headline have been up to date with extra developments Thursday.

CNN’s Zachary Cohen contributed to this report.