Contamination Flashcards
1
Q
What is contamination?
A
making something impure by exposure or addition of a polluting substance
(only counts if added after the crime occurred. if before = innocent transfer = adventitious transfer
2
Q
A contamination event
A
- needs to be a source
- needs an opportunity to occur
(consumable to stain, person to stain, stain to stain) - needs mechanism for transfer to be achieved
3
Q
Drop- in
A
contamination where 1 or 2 alleles present in profile but not the extract (fallen in while preparing the sample)
eg dust particles in the lab
