Knight said his department was advised about 5:30 a.m. Monday to watch for a low-flying aircraft. A single-engine plane was found abandoned in a field beside a runway at Caddo Mills Municipal Airport about two hours later.
No injuries or damage was reported. Knight said the public has turned in four black nylon duffel bags filled with what appeared to be high-grade, hydroponic marijuana. Deputies found two other bags of pot in the plane.
A man is in custody for questioning, but no charges have been filed in the case.
Caddo Mills is about 35 miles northeast of Dallas.