On Friday, about 10 police cars arrived at the Nazareth hospital in Kiambu commando style.
The cars were full of Anti-Terrorism Police Unit officers in combat gear ready for action.
The officers, and a special squad set up by Director of Criminal Investigations boss George Kinoti, were pursuing one Erick Kinyanjui Munyi.
Initially, police thought Kinyanjui was among the gunmen who were felled by bullets at the DusitD2 hotel complex by Wednesday.
This was after a phone that was left in the Toyota Ractis KCN 340E that the attackers used to gain entrance into DusitD2 showed that it was registered under Kinyanjui’s ID number.
As police did further investigations to unmask the web of the attackers, they realised that another sim card registered under the same Kinyanjui was active and that is when tracking down started.
Detectives from Dagoretti DCI led the operation to trace Kinyanjui who was cornered at Nazareth Hospital.
To the shock of the battery of high-armed officers, Kinyanjui was a harmless trainee nurse.
The trainee trembled as officers grilled him over the deadly attack that saw President Uhuru Kenyatta take an urgent flight from Mombasa to Nairobi to address the nation.
After hours of grilling, it emerged that Kinyanjui’s lost identity card had been used by the gunmen to register multiple sim cards for communication during plans for their bloody attack.