Originally Posted by SATTSO

In fofana the passenger was designated as a selectee, and per SOP EVERYTHING that passenger has on them must be searched for WEI. This is NOT a searched conducted because a TSO feels a prohibited item may be there. This is search conducted because of the recognition that TSA recognizes that nothing is perfect and WEI may pass through the x-ray undetected. So SOP dictates a through hand search of all selectees property to specifically look for WEI, as in fofana was done in fofana.

And as you stated, it does not matter what the TSO believes (as she stated she did not believe there were any WEI present, so she said she was looking for contraband). Her opinion was not relevant to why this search was taking place. But the judge had only the statements to go on, and not SOP, so I understand why the decision was rendered.
And I can tell you this: not one thing has had to be changed or re-written regarding selected searches because of this ruling. It is still conducted to find WEIs.

Edit: and I agree with you on another matter - the decision was based almost entirely on what the TSO said. If she has said she opened the envelope to look for WEI (such as an improvised det, which is easily hid in an envelope), I believe the decision would have been in TSAs favor.