A California district attorney filed a criminal lawsuit against two companies that deal in the parts of aborted fetuses Tuesday, alleging the research firms are illegally profiting from the sale of unborn baby parts.

The lawsuit alleges DaVinci Biosciences and DV Biologics used fetal tissue obtained from Planned Parenthood and other providers to run a “profit-driven” business, reports The Orange County Register. It was filed by the Orange County District Attorney, who is expected to hold a press conference Wednesday.

Both companies work as middlemen between abortion clinics and scientists demanding the parts of unborn babies to further their research. The gruesome ins and outs of the procurement process — from an unborn baby living in his or her mother’s womb to a box of hands and feet opened in a science lab — came to light after Congress opened an investigation into the industry last year.

CMP released a series of undercover videos in which top Planned Parenthood doctors talk frankly about harvesting fetuses for researchers, and technicians are seen dissecting aborted fetuses for parts. Other footage features a whistleblower who worked as a procurement technician talking about her experience, at one point saying the work was so shocking she passed out on her first day.

The videos led to several congressional investigations and a bill to defund Planned Parenthood, which receives half a billion federal tax dollars each year. The House and Senate passed a defunding measure, but President Barack Obama vetoed the bill. A total of ten states, however, have defunded the organization.

CMP’s allegations that Planned Parenthood profited from the sale of fetal tissue — a charge the non-profit denies — have not led to prosecution so far. In a statement celebrating the lawsuit, CMP said Tuesday “the wheels of justice are beginning to turn” against Planned Parenthood. “If DaVinci Bio is guilty, Planned Parenthood is guilty too as their primary accomplice in selling aborted baby parts,” CMP added in an email blast.

Planned Parenthood did not immediately respond to a request for comment.

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