Possible Burial location. IMO There is no implication of this individual being involved but is only for location purposes.
I have been looking at the Property in Texas Co OK that has been disclosed and find that "he" owns property in section 8, TWP 3N Range 10E and it is about 8.6 miles from the car location and there are a couple ponds according to Google Earth and Acre Value. Pond is in SE 1/4 of section 8
This location is 8.62 miles SW of the abandoned car. (5.4 mi west and 6.8 mi south of the abandoned car)
JMO and Suppositions.