German man stands trial 42 years after 1984 strangling of Maria Köhler

A man is on trial in Germany for the 1984 strangling of 19-year-old Maria Köhler, a cold case reopened after decades. The prosecution alleges a crime of jealousy, but the evidence is likely circumstantial given the time elapsed. The case highlights advances in forensic investigation and the pursuit of justice in long-unsolved crimes.