The power of Y-DNA in tracing and confirming lineages

Since Y-DNA is passed exclusively from father to son and remains the same with some mutation for generations it can be a valuable tool for tracing and confirming paternal lineage.
David has been instrumental in using DNA in criminal cases, for example he helped the police solve a criminal case that has remained unsolved for 29 years. A child was found in a container as a newborn. This is the first time that the combination of DNA analysis and genealogy has succeeded in solving a criminal case in Norway.