Birgit Meier’s disappearance gets a renewed look with “Dig Deeper: The Disappearance of Birgit Meier,” a new docuseries that begins streaming on Netflix last week. Meier, 41, a mother and talented ...

When German mother Birgit Meier vanished, police originally suspected suicide or that she had run away. But her disappearance was later linked to a suspected serial killer named Kurt-Werner Wichmann.

After Birgit Meier vanishes in 1989, police missteps plague the case for years. But her brother never wavers in his tireless quest to find the truth.

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Soon after Birgit goes missing, questions arise over a possible connection to other recent crimes — but the investigation gets off to a rocky start. Birgit's brother, Wolfgang, grows frustrated by the ...