Five NTSA officials were on Friday presented before Senior Resident Magistrate Caroline Nzibe in the probe involving the car used by 14 Riverside attackers.
The five are accused of being involved in a racket for making fake motor vehicle plates.
The police believe that Anthony Kadu, Jacqueline Githinji, Cosmas Ngeso, Irving Irungu, Stephen Kariuki and Charles Ndung’u aided the attackers by issuing fake number plates to the attackers.
The prosecution led by Duncan Ondimu asked to be allowed to detain the suspects for 30 days, as they conduct investigations.
The Toyota Ractis, registration number KCN 240E, was used by the four attackers who staged a terror at the hotel on January 15 killing 21 people.
It later emerged that there was a different car with similar registration in Kitengela, Kajiado County.