Extreme skepticism is my default position on about everythying, including this. But the science from that lander was been very interesting and I've always had the suspicion that embarrassing (that is to say, not easily explainable) data were swept under the rug. There have been credible scientists with credible-sounding names who have argued all along evidence of life was found. (I'd have to research the details to refresh my memory but a lot has been published about this).
I remember the lander and the evidence. It was pretty exiting stuff. I’m just sceptical about this particular claim that there is definitive proof that scientists have overlooked since the “scientist” in question deals in parapsychology. I would guess he’s hardly trained to make that judgement.