article_snippet: NSW Unsolved Homicide Squad have launched an investigation into four of the country's most notorious serial killers in an effort to determine whether The men were responsible for more unsolved murders.
article_snippet: Dozens of unsolved deaths are being re-opened and examined for links to The men by a review team from the NSW Unsolved Homicide Squad, a move which Inspector John Lehmann said was motivated by a desire for justice.
article_snippet: the NSW Unsolved Homicide Squad is currently investigating more than 600 unsolved murders which date back to 1965.
highlights_snippet: NSW Unsolved Homicide Squad is investigating more then 600 cold cases .
  
highlights_snippet: NSW Unsolved Homicide Squad is hopeful that the investigation will lead to more solved cases .
  