With every new piece of information that has come to light about the perpetrators of the 14 Riverside Drive attacks, it has become clearer that the authorities knew about Mahir Khalid Riziki, the suicide bomber.
They had his photos, names and contacts of his relatives and friends yet it is not clear why they failed to stop him from blowing himself up.
In a widely-shared CCTV footage, the suicide bomber is captured outside the Secret Garden Restaurant in the Dusit Complex moments before he blows himself up, killing an unknown number of people with him.
His accomplices later came in and started an orgy of senseless killing that elite forces put to an end on Wednesday morning by killing all the terrorists.
Almost all local security and intelligence agencies had dossiers identifying him as a radical with several dots on the radar screen, including after the deadly Garissa University attack in 2015 where 147 people were slaughtered.
Mombasa-born Riziki had by then appeared in a 2014 police poster as one of the most wanted men but was once again displayed as part of the network that supported the attack.
A few days before Riziki walked to 14 Riverside Drive terror attack that claimed at least 21 lives and blew himself up, anti-terror police had raided his home in the notorious Majengo neighbourhood, Mombasa, on January 7 and picked his wife Suhaila Mwalim Bakari for interrogation.
Yet her husband, a renowned terrorist linked to Ahmad Iman Ali and Abdifatah Abubakar Abdi, both on the UN and US lists of global jihadists, was walking a free man.
Riziki was first put on the list of most wanted individuals in November 2014.
Alongside six others, he was accused of being among the suspects behind the wave of killings at the Kenyan Coast.
In April 2015, hours after the end of the siege at Garissa University in which 147 students lost their lives, the police released his name alongside eight others, labelling them “most wanted”.
Besides Riziki, others listed were Ismael Shosi Mohamed aka Ismael Mmanga, Abdulkarim Mzee aka Abdul, Farah Abdi Farah, Kayuni Khatib Khamisi, Fauz Omar Mohamed, Swaleh Ramadhan, Suleiman Mohamed Awadh, Abdalla Salim Marumu, Abdifataha Abubakar Abdi aka Musa Muhajir (a Somali citizen), Mohamed Abubakar Mohamed and Muumin Abdalla Muumin.
Kayuni, Saraj aka Abdul and Ramadhan surrendered themselves to the police as early as November 2014.