Immediate former Interior CS Fred Matiang'i has been summoned to appear before the DCI on Friday.
In a letter, detective Michael Sang directed Matiang'i to appear before him at Mazingira House at 9.30 am without fail.
The summon is in relation to the alleged police raid at his Karen home on the night of February 8.
"I have reasons to believe that you, Dr. Fred Matiang'i, the former Cabinet secretary, Ministry of Interior and National Co-ordination, is connected to the offence or has information which can assist me in my investigations," detective Sang said.
Matiang'i's lawyer Danstan Omari, however, said the former CS had not been served with the summon.
"My client has not been served according to the law and we don't recognise what we are seeing in social media until we are served properly," Omari said.
The summon come even as the high court on Thursday extended orders stopping police from arresting the former Interior CS.
Justice Justus Bwonwong’a extended the conservatory orders which were to lapse on Thursday to runup to April 19 when the matter will come up for mention.
The extension of the orders followed an earlier anticipatory bail which had been issued by Justice Kanyi Kimondo on February 9.
The judge also granted the ex-CS a Sh200,000 personal bond after he expressed fear that the police could arrest him.
Matiang'i's fears would later be lent credence on February 15 when police broke into his house to look for CCTV footage on the alleged home raid.
DCI Mohamed Amin denied ever having deployed officers to Matiang'i's home and said they obtained a search warrant to get the CCTV recordings as proof.
This statement was, however, contradicted by lawyer Omari who said that police had not obtained any such orders.
"Out of frustration, they drive here in a military form without a court order, get inside the house of the former CS and ransacked his house," he said.
The lawyer said the police officers only stopped ransacking the house after they asked for the court order.
Matiang'i's last public appearance was before the home raid saga on January 31 when he accompanied former President Uhuru Kenyatta to the late Education CS George Magoha's home in Lavington.
On February 9, his lawyer Omari attributed the alleged raid at his home to what the former CS said while paying tribute to Magoha.
"Professor Magoha dies, our client gives a speech, less than 12 hours his security detail is downgraded, less than 24 hours, a serious attack in his house," Omari said in a press address outside Milimani courts.
He said the sequence of events pointed to "a choreographed attack on former CSs including the former head of state."
Omari was on Tuesday also summoned by DCI in relation to his remarks that a "garrison" and or a "battalion" of police officers raided Matiang'i's home on February 8.
The summon was, however, suspended on Wednesday by the court.