Was this one of the test taken at the scene of the crime.
This kit would prove Nancy Lanza as a rapist or it would clear her name.
This would also offer to many victims of rape, abuse a legal tracking system to prove abusers guilt in cases other than rape, also child abuse. This testing validates if the fluids of the child/victim are in the fluids of the abuser, this connects the accusations of the crime. It can also help with the rehabilitation process of young offenders.