Strange how this keeps coming up but is always framed in a manner constrained to advance this argument. Satellite photography of local area parking lots show an extremely large surge in illness in the winter of 2019. If remarkable numbers of people all over the city were suddenly becoming sick then is it odd that researches also fell sick at this time? Abandoning virology in order to pursue the matter as an exciting who did it mystery may not reach correct conclusions.
News that was suspected a long time ago, and due to the delay, being stigmatized, and memory-holing of it, the public's attention span and interest will make it a lot softer on getting to the bottom of it and prosecuting the guilty.