The wording in the linked article makes me wonder if the search warrant the media is quoting (the one we have not seen), is intentionally broad in description. Meaning, LE felt they may find "documents in reference to prior criminal acts, evidence of prior abductions, instruments of sexual deviation, journals" .
It doesn't mean they would find everything listed in the search warrant, but the bases need to be covered in the event they did find something and could legally seize it. The only way we will know exactly what was found, is if we had a copy of the search warrant return, listing the evidence seized.
It's late, I'm tired, I hope that made sense.