they have already found it, the cia just won reveal it, just my belief though, no way in hell modern technology cant find it

Well, I'd disagree there. The area in which the plane could have crashed is still very large. Even with good satellite images, it's going to take a long while to see anything. And if you find something, pinpointing the place, going there by boat, ... is going to take a while, and by then, the object you saw might have relocated.

Besides, what would the motive for the CIA be?

As Arglax said, what motive could the CIA possibly have? I feel as if you're just saying this based off nothing.

question to anybody who knows:
How were they able to estimate the location and or that the flight pattern changed?

English company took the known flight path until the tracking device shut off. Using that information and known flight range, a possible flight area was made that stretched from the edge of the middle east (hence all the conspiracies of plane gonna be used for terror (even though that would make the plane fly into American military airspace)) to the southern parts of the Indian Ocean, extending out to about the Eastern coast of Africa.

From there, pings were detected from the blackbox coming from the Indian Ocean. Using the location data that could be gleamed from it, they established a likely crash area about the size of Texas, later reduced in size to about a large city. Now it's the process of finding a needle in a haystack, as they have to resort to sonar and submersible sweeps to find debris in that area. Not exactly easy.