Unknown falling/drifting object West of Olathe, Kansas.White or shiny object drifting slowly down. Don't know size of object to help judge the altitude and distance, but I would say first observed at 15,000' and following it slowly down to approx. 3,000' when it was lost visually due to white cloud background. First witness said she heard jet noise then looked west and saw a jet climbing somewhat vertical. After jet disappeared from sight she looked a little south and saw the object in question. I skydive and would compare it to a cutaway parachute drifting down with no real pattern and at a fairly slow rate. We watched it for 4 or 5 minutes before losing sight. Contacted FAA FSDO office. He contacted KC Center and New Century Tower and neither had any reports. Air traffic in vicinity was warned of potential object.((NUFORC Note: Witness elects to remain totally anonymous; provides no contact information. PD))