They claim to have new evidence that they say will be indisputable with regard to contamination of the crime scene.
It cannot be ruled out that the result obtained may stem from contamination.
The contamination was ultimately traced back to a scrub technician named Kristen Parker.
early 15c., from Latin contaminationem (nominative contaminatio), noun of action from past participle stem of contaminare (see contaminate). Figurative sense is from c.1620; specifically of radioactivity from 1913.
contamination con·tam·i·na·tion (kən-tām'ə-nā'shən)
The act or process of rendering something harmful or unsuitable.
The presence of extraneous, especially infectious, material that renders a substance or preparation impure or harmful.