Digital, Innovations and Diaspora Communications Secretary Dennis Itumbi was on Wednesday arrested by DCI officers.
Itumbi was reportedly taken into custody in probe over a fake letter on an alleged plot to assassinate Deputy President William Ruto.
The digital strategist was reportedly picked up by Flying Squad officers at City Hall and bundled into a vehicle belonging to the DCI.
He was taken to Muthaiga Police Station and is set to be arraigned in court tomorrow.
Over the recent weeks, a letter claimed to have been penned by a Cabinet Secretary alleging some colleagues were plotting to assassinate the DP emerged.
On Sunday, Daily Nation published a story which he claimed indirectly linked him to the letter.
The article detailed that two of DP Ruto's aides were being sought by the police on claims that they were responsible for circulating the fake letter.
"They mentioned where the communication officers allegedly being sought work. We are about 10. None of us got a call or a text. Copy and paste journalism from unnamed sources who lie, should not find a home.
"Journalism is at its lowest form, when Daily Nation pens a story and reproduces allegation after allegation - but does not bother to call or text any of the communication officers in the Presidency they claim are being sought by DCI and are in hiding," Itumbi lashed out.
Doubts clouded the entire letter's authenticity after the detectives failed to find a hard copy of the same at the house on the hill.
Earlier on, DCI officers disclosed that they had successfully traced the source of the controversial letter and that there would be summons soon.
The detectives had received preliminary findings on the source of the letter from the US Federal Bureau of Investigation (FBI).
