Taint means to ruin or to contaminate or corrupt. In legal parlance, the term taint is usually used in connection with testimony, evidence, or confession that is obtained illegally. Tainted evidence is also known as “fruit of the poisonous tree”. Thus taint means to touch or affect slightly with something bad or undesirable or to contaminate morally. [Brown v. Trustees of Boston University, 891 F.2d 337, 353 (1st Cir. 1989)].