RE Priori Incantatem and the misplaced spell

[katssirius]

No: HPFGUIDX 155317

Bridge13219:
>> I remember in that scene LV wand was producing/echoing screams
as well as the shadows of the people he killed. Maybe one of those
screams was him when the AK rebounded on himself (in addition to all
the Crusios he had done). <<


katssirius:
In response to the suggestion that it is hidden in other screams,
unfortunately there is only a long pause between Bertha' echo and
Lily's echo.  Even if Voldemort was disembodied (as Geoff suggested)
the spell is not there.  Other less significant pieces of magic show
up like Crucios in the form of their results.  So whatever happened
to Voldy should have come out of that wand unless it was not used.
Did JKR just forget to include it or is the absence significant?
Explanations anyone?