According to Amaral's book Kate's 5 fingerprints from the middle and index fingers of her left hand were found on the glass, the handle and the right hand frame of the children's bedroom window. (page 80)
I can think of no reason why Kate would have touched the handle because it would have been behind the left hand curtains if the window was fully opened. It also raises the question of how Gerry shut the window without smudging her print on the handle.
You are quoting an inaccuracy from Amaral's book which is misleading.
Kate left no fingerprints on the handle or on the frame of the window. The only fingerprints left were on the window glass and were commensurate with her leaning out ... not opening ... the window.
SnipVESTIGES COLLECTED
5….. Fingerprints….Inside interior window of the children’s bedroom…..DBT…..Suf
1. Methodology and means of operation:
2. Established number of supposed authors:
3. Abandoned objects:
4. Objects or values that were the target of the crime:
5. Importance of the damage incurred:
Observations: The fingerprint traces collected are identified as being the middle finger of the left hand (3x) and forefinger of the left hand (2x), of the missing girl’s mother,
https://www.mccannpjfiles.co.uk/PJ/FINGERPRINTS.htmSnipThe 5 KM prints were all located on the
"Lado interior do vidro da janela"
"Interior surface of the glass of the window"
http://www.mccannpjfiles.co.uk/P4/04_VOLUME_IVa_Page_884a.jpghttp://miscarriageofjustice.co/index.php?topic=1868.msg259170#msg259170