31°57'23.39"S 115°55'56.34"E   evidence
32° 3'52.55"S 115°59'56.02"E   missing persons
31°57'33.31"S 115°55'37.83"E   crime scene (underground)

31°59'48.90"S 115°54'55.84"E  crime scene
32° 2'37.93"S 116° 0'22.37"E  evidence

Device 100yards underground in aquifer
close to these coordinates. Within a mile or so.
It's  a box about 1.4x1.4 yards.
31°21'51.15"S 116°20'53.90"E
31°25'23.77"S 116°22'40.58"E - revised (Dam with 4000 bodies 500 Yards S/E)