Citizen TV has exposed the group of masked men who were seen shooting without warning during the Saba Saba protests.
The group is made up of officers from the Directorate of Criminal Investigations, the Anti-Terror Police Unit, and the National Intelligence Service.
These officers wore face covers and used private cars to hide their identity.
Some videos showed them firing at crowds and even at buildings where people were filming them.
They were not in uniform and moved in groups through protest zones.
Their actions shocked many Kenyans who had come out to express themselves peacefully.
The Police Reforms Working Group has said the officers broke the law by hiding their faces and using heavy weapons.
The group wants top police bosses to explain who allowed the group to be on the streets.
Among those mentioned are Director of DCI Mohammed Amin, National Police Service Director of Operations Adamson Bungei, and Said Kiprotich who leads the anti-terror unit.
Also named is National Intelligence Service Director Noordin Haji.
These officials are now being asked to explain what role they played in the operation.
The public wants to know why force was used on people who were not armed.
Human rights groups have said a full investigation must be done to find the truth.
They say those behind the killings should be taken to court.
Families who lost loved ones are still waiting for answers. Survivors say they were attacked without reason and want justice as soon as possible.
This report by Citizen TV has now raised more concerns about the safety of protesters.
Many Kenyans are watching to see what action will be taken next.
By Kenyans