Interrogating Special Branch on 'May 13' riots

Assuming and just assuming, for the purpose of analysis to achieve moral clarity, the Malaysian police Special Branch (SB) has always been omniscient or all-knowing even in 1969, then why couldn't it help the authorities to prevent the outbreak of the 'May 13' riots in Kuala Lumpur ? So, claiming omniscience or to be all-knowing carries the legal duty and moral responsibility of doing the right thing at the right time.

Speaking at the launch of May 13 - Declassified Documents on Malaysian Riots of 1969, retired SB chief and ex-CPO of Sarawak and Perak Yuen Yuet Leng also said, however, that the police Special Branch did not know in advance ' May 13' would be occuring, which logically means that it is not always omniscient or all-knowing and that its archive may not be "more accurate" than the British dossiers. No one, not even the Special Branch, can have the pie and eat it too.