CLEVELAND (WJW) -- The FOX 8 I-Team has uncovered more about a mystery, raising new questions about plans to build a dome for the Cleveland Browns in the shadow of Cleveland Hopkins International Airport.

The I-Team investigated the story behind a sudden snag for the project, a state denial of a construction permit.

The Ohio Department of Transportation determined that building a dome across from Hopkins Airport would interfere with air traffic. But, as we started asking what led to this, we found more mystery.

We took a closer look at a denial letter from ODOT, and we noticed it had no signature.

Earlier, we reported the Federal Aviation Administration had made a determination that the dome would be "no hazard" to air navigation.

But, we also learned weeks later that Cuyahoga County

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