India, April 24 -- James 'Tony' Moffatt, an aerospace engineer, was killed in a plane crash in South Carolina last week. Now questions are being raised if the death was related to the deaths and disappearances of 11 other scientists linked to space and nuclear research.

Moffatt was also a decorated veteran pilot and defense researcher. He was traveling with wife Leasa, 61, and sons Andrew, 30, and William, 28. Their plane - a Mooney M20 single-engine aircraft - crashed in a wooded area located near the Union County Airport runway on Friday. The family hailing from Huntsville, Alabama and were traveling from the Raleigh-Durham area of North Carolina. They had stopped in Union County to refuel.

While an official cause of the crash has not...