I was working on another aircraft at Aspen/Pitkin airport at the time this aircraft took off. I saw a lime green SR22T (N288WT) and didn't think much about it at the time. It was snowy weather with marginal visibility. My guess is that the pitot probe(s) ports iced up and sent erroneous air data to his instruments and making flying the aircraft very difficult. Amazing that they took off in that weather, it was crumby. Flightaware.com showed that it landed in EGE but obviously it did not. I heard that there was "an incident" and that we would have to wait until the next day for assistance we required that day.