Since the 19th century, the infamous Pinkerton spy agency has a history of union-busting and involving itself in businesses.
Now, Business Insider reports Amazon has turned to Pinkerton to monitor European workers' labor union organizing efforts.
Leaked documents from Amazon's Global Security Operations Center revealed analysts have been tracking workers' union organizing activities.
A report from Motherboard also disclosed that Amazon data analysts use social media to monitor social justice and environmental activist groups' activities.
It's the latest in a string of evidence that highlights Amazon's robust efforts to monitor and crack down on its workers unionizing.
Earlier this year, Amazon listed, but quickly removed, a job opening for an analyst that would monitor employee's efforts to organize.