Forensic Files II: Season 1, Episode 9

1 - 9: Family Tree

In 1987, a young Canadian couple is brutally slain while on a road trip from British Columbia to Seattle, Washington. After their bodies are found, the victims' families begin receiving disturbing letters. The case goes unsolved for more than 30 years, until forensic investigators use personal genomics to help solve the case, ultimately making forensic history.