Nah I often get mixed up with swab swap.. XD
Lead is one of the elements a GSR kit is designed to pick up on. I don't believe the tests are invalid or anything was swapped around.
Read the lab documents below. "These findings indicate that Sheila Caffell is unlikely to have loaded cartridges into the magazine shortly before her death" Its a well known fact that trace elements do not stay on living subjects for that long. The magazine could have last been loaded several hours before her death.
Furthermore the XRF results show that Sheila had four times as much lead on her right hand than her left hand. As it goes the same ratio as one of the lab testees. It is no coincidence IMO that Sheila being right handed had four times as much lead on her right hand than her left hand.
David taking the docs you posted above (thanks btw) there are two measurements: lead measured in micrograms and also wavelength based on how the lead responds when bombarded with gamma rays:
Testee/SC Hand Mg G Wavelength
JWH RH 15 0.15 11425
JWH LH 3 0.003 3480
SW RH 8 0.008 8019
SW LH 4 0.004 4425
SC RH 1.2 0.0012 1345
SC LH 0.10 0.0001 337
Hand = Left/Right
Mg = Microgram
G = Gram
I've added in an extra column for gram as this is something we can all relate to from measuring out cooking ingredients.
The microgram wasn't provided for SC but I've worked it out approx based on the wavelength and micrograms provided for the testees.
At 1.28min in the D lead vid shows pads containing 20, 50 and 100 micrograms of lead taken from the hand. You will see how the area containing 20 mg is very small and this is more than twice the amount on JWH's RH.
https://uk.video.search.yahoo.com/search/video?fr=moz35&p=d+lead+youtube+testing+lead+on+hands#id=1&vid=feeccc9564ac8d525c67dc7edbd763d7&action=clickIn the 2002 appeal Dr Lloyd is quoted as saying the results were not qualitatively different. Was this a typo and should it have read quantitatively?
218. Dr Lloyd's conclusions, as apparent from a report with which we were supplied, were principally that the lead found on the handswabs from Sheila Caffell and from those tested in the laboratory came from petrol combustion residues and was not connected with the handling of bullets. Secondly that the handswabs from Sheila Caffell were not qualitatively different from those from the testees. He was critical of the laboratory test saying that swabs should have been taken both before the handling of the bullets so that a comparison could have been made between the two. Accordingly in his opinion the test results were of no assistance to the determination of whether or not Sheila Caffell had handled the cartridges in the same manner as the testees. or quantitatively?