Six workers at a Butterball turkey farm in North Carolina face criminal charges after an undercover video revealed alleged animal abuse, and a state employee who tipped off Butterball before a police raid on the farm has pled guilty to obstruction of justice. Butterball ... accounts for 20 percent of total turkey production in the U.S.. Mercy for Animals [is] the animal rights group that shot the undercover video. Unfortunately, every time we send an investigator they emerge with shocking evidence of animal abuse," said MFA executive director Nathan Runkle. "Before ending up in restaurants and grocery stores, turkeys killed for Butterball are routinely crowded into filthy warehouses, neglected to die from infected, bloody wounds, and thrown, kicked, and beaten by factory farm workers." In addition, Dr. Sarah Mason, a veterinarian at the North Carolina Department of Agriculture, was suspended from her job ... and was sentenced to 45 days in the Hoke County jail after pleading guilty to obstructing justice and obstructing a public officer. Mason admitted calling a friend who worked at Butterball prior to the raid. Though she initially denied talking to the Butterball employee, Dr. Mason later admitted telling him about the existence of the Mercy for Animals video showing alleged abuse. In the video, workers can be seen kicking and stomping on turkeys, as well as dragging them by their wings and necks. The video also shows injured birds with open wounds and exposed flesh. Butterball ... has said it was "shocked" by the undercover video, is taking the animal cruelty investigation seriously.