A paternity index (PI) score of 1 is assigned to each marker that matches the alleged fathers and the childs DNA profile while a PI score of 0 is assigned to every non-match. The PI is the likelihood ratio that indicates whether the evidence fits better with the hypothesis that the man is the father or with the hypothesis that someone else is the father.
The combined paternity index (CPI) is then computed by multiplying the PIs then converted to a probability of paternity value. The larger the CPI, the more strongly the hypothesis that the alleged father is the true biological father is supported by the genetic evidence. The alleged father is ruled out as the biological father if he does not share a number in common at 3 or more genetic systems.
We are also capable of providing further tests and statistical analyses in complicated cases leading to accurate and irrefutable results.