A footnote relating to the PA28R201T, as I used to instruct on these.
In common with many products from this manufacturer, there was an automatic gear lowering feature, which doubtless saved many a red face in the flying club bar, but was a pain in the neck in the event of an engine failure. Our SOP was to override the system.
If you did not, as you reduced towards best slide speed, the gear would suddenly deploy and your carefully planned circuit would be history.
The extra drag is significant on this aircraft type.
Very sad to see two people lose their lives in this accident.