Are the Viking Experiments the End of the Story?

In 20 18, nassau announced that the curiosity rover has discovered or anic molecules in sedimentary rocks on mars. So contrary to the not sensitive enough g c m s test in the 19 seventies, we now know that martian soil does contain organic molecules. It is very difficult to prove life existed three point six billion years ago on earth, let alone on mars. Even more reason to suspect life on mars are the viking experiments the end of the story at this point? By no means.