On the subject of Gun Shot Residue (gsr). . .
I would like to see and know the exact process that was used to check the Lt for gsr. There are several techniques for doing so and some techniques reveal more information than others do.
For example with some techniques (maybe most) a clean sterile cloth is used to wipe the hands and or clothing and then it is then tested with a chemical that reacts with the residue.
That's a fairly reliable test if all you are looking for is the presence of gsr. However, it doesn't reveal much else.
The test I hope was done would be that the Lt's palms were tested separately.
If he was holding the gun, she should have little to no gsr on his palm. Conversely, if someone else was holding the gun, he would likely have his hands up or was reaching towards the gun and he would then have had significantly more gsr on his palms.
[video=youtube;6scYmo95hHI]https://www.youtube.com/watch?v=6scYmo95hHI[/video]