♪ >> bret: there is new information tonight about some of the people in charge of investigating the origins of the coronavirus. correspondent david spunt tells us there are allegations, serious allegations of what may have been a serious conflict of interest. >> there are more questions surrounding the inner workings of china's wuhan of viral after a new investigation reveals 26 well known scientists across the globe have, in some cases, ties to the controversial lab. >> all the way out. >> let's go back to january 2020, when americans first learned of the virus. >> there is a lot of fear out there about this thing. what do they need to know? >> understandably they need -- there is concern. >> one month later in february 2020, a group of 27 scientists from australia to the united states published an open letter in the lancet medical journal aggressively quashing the idea that covid-19 came from behind the walls of the wuhan institute as part of a lab leak. more than a year and a half