That has been on the minds of many from day one, including my own. Very unlikely we will ever get the real truth. Some things are "too big to fail", some are "too sinister to tell"...
For the record, I hold a very neutral position on this topic. I would not be surprised if it was just another case of a bio-weapon that either slipped out or was deliberately unleashed. History does offer factual evidence from a few countries engaged in it and I am familiar with at least a few incidences.
At the same time, I would also not be surprised it is completely natural, although the deeper the research goes, the slimmer the odds are becoming. The article of this being a "Chimera" virus, two viruses that somehow infected the same host at once and recombined? Hmmm....