Post Number: 247
|Posted on Wednesday, October 03, 2007 - 11:30 pm: ||
DNA can often be obtained from lip contact on cups, drinking bottles, drinking straws, etc., regardless of the quality of any lip impressions present.
Unless a person is about to die of dehydration, there is generally saliva present when they open their mouth to drink from a cup, bottle, straw, etc., ...but saliva does not have to be present to obtain DNA.
The application of lipstick would effect the quality of visible lip impressions, but does not necessarily preclude the ability to obtain the lipstick wearer's DNA from questioned impressions.