On January 9, Clayton McGeeney, 37, Ricky Johnson, 38, and David Harrington, 36, were found deceased on Jordan Willis' Kansas property.
The Knox County, Kentucky neighbor, who requested anonymity out of fear for his safety, said he and Couch, 32, were initially cordial.
Gray would allegedly go on to fatally shoot two classmates and two teachers at Apalachee High School in Winder, Georgia, Wednesday.
The children were between 13 and 18 years old, and were recovered in Cleveland and Akron, Ohio. One victim was found in Washington state.
