Pierce County sheriff’s spokesman Jerry Bates said it is unclear yet how the two people died or who they were.
The four people detained were found in a vehicle associated with the house where the bodies were found.
The News Tribune reported that experts from the sheriff’s office were called to examine a possible booby trap in the home. Bates later said that investigators believe that the suspicious wiring connected to an outbuilding may be part of an old marijuana grow.
The bodies were found around 8:30 a.m. Sunday by a deputy who was doing a routine address check on sexual offenders.
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