The warrants, spanning from December 2022 to February, reveal that investigators were looking to search the phone records of a couple in Moore County following a tip that they may have been involved.
One of the warrants showed a phone number of interest pinged on a phone tower less than a mile away from one of the substations that was hit.
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The Moore County Sheriff's Office does not have any outstanding search warrants.
There are no pending charges against anyone in connection to the attacks.