Indiana state troopers say they found a steroid manufacturing lab behind a bookcase in southern Indiana.

LAWRENCEBURG, Ind. (WTHR) — Indiana state troopers say they found a steroid manufacturing lab behind a bookcase in southern Indiana.

Police launched an investigation in February after discovering a package in Lawrenceburg that was on its way to Cincinnati, Ohio.

It turned out that the package had a compound similar to steroids. Police found the room where the bookcase was contained a sophisticated manufacturing operation, complete with a ventilation system.

Troopers searched the home and discovered about 25,000 pills or capsules of steroids ready to be sent out.

Police arrested 35-year-old Nicholas and 34-year-old Cori Gilbertson on several drug charges. The investigation led to police learning the Gilbertsons oten sold nearly $80,000 worth of steroids each month since their involvement in the operation began.

Their clients often paid with the cryptocurrency bitcoin.