carlton's home, they found this critical piece of evidence. proof that carlton's guise of legitimacy, that his drugs were being sold for research, was all just a cover for their real purpose. in his own hand carlton was detailing how to use his drugs and just how dangerous they could be. >> it was a journal documenting these substances being used by mr. carlton and friends of mr. carlton and the effects and the various amounts of the substances and how they would affect the body. and that was powerful evidence to show that they knew full well what these substances would do and informed this company to sell them. >> carlton decided not to fight and has pled guilty to three counts -- possession with intent to distribute controlled substance analog, money laundering, and misbranding. it could send him to prison for life. >> i can't justify anything that i did.