After Cathy Thomas and her girlfriend Becky Dowski are murdered, authorities are left to wonder if this is a hate crime or the birth of something more ominous.

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After Cassandra Hailey and Keith Call go missing, police wonder if a third double homicide on the Colonial Parkway is an unnerving coincidence or proof of a serial killer?

The murders of Annamaria Phelps and Daniel Lauer convince law enforcement that a serial killer is terrorising Northern Virginia.