Detectives from the Internal Affairs Unit (IAU) have arrested four more police officers linked to the disbanded Special Services Unit (SSU) squad.
In a statement shared on Wednesday, November 30, IAU noted that the four were detained at Capital Hill Police Station in Nairobi awaiting to be arraigned in court on Thursday, December 1.
According to the IAU, the four were slated to undergo DNA tests to facilitate further investigations into their involvement in the series of extra-judicial killings reported in the past.

However, the DNA tests did not go as planned due to a lack of the requisite facilities at the Directorate of Criminal Investigations (DCI) laboratories.
Attempts by the detectives to use a government laboratory proved futile as the suspects reject the option.
IAU reported that the suspects were under instructions from the defence lawyers to reject any attempt of using government chemists.
"The court had previously ordered a DNA test to be conducted at DCI labs which unfortunately has no facilities for the exercise," read a statement from the IAU.
Further, the investigative unit noted that two senior officers from DCI headquarters alleged to have been directly involved with SSU recorded statements pertaining to the inner workings of the disbanded Unit and the disappearance of two Indians and their taxi driver.
The two, according to the statement, distanced themselves from any connection to the SSU unit in its operations.
IAU operatives also extended their probe to officers attached to the Kenya Wildlife Services in a bid to dig deeper into the alleged involvement of an officer attached to the Nyeri Abadares forest.
As per the statement, the move to investigate KWS created tension within the wildlife service and other units linked to the alleged dirty deeds that left scores dead under mysterious conditions.
The four brought the number of officers looped to the mysterious murders to 12. SSU was disbanded after an order made by President William Ruto, shortly after assuming power.
Ruto was on record vowing to bring the extra-judicial killings to an end in his tenure as the President.