I´m just wild guessing here, but if the US had had the MH370 located with a classified radar or satellite, and they know it had crashed, It would be stupid to d

I´m just wild guessing here, but if the US had had the MH370 located with a classified radar or satellite, and they know it had crashed, It would be stupid to disclose that technology. They would better use available resources to point the actual position to the search teams (like: "look at this interesting satellite ping arc"), without showing that they knew the position all the time. I´m not telling this is the actual case, but I would do it if I were the one in charge of such technology.