In October 2001, a tip from PETA led authorities to raid a New Jersey warehouse that was holding dogfights. Patrons bet more than $30,000 that night, and four dogs were injured during the fights and later euthanized. Police arrested 43 people, both alleged organizers and spectators. The dogfight fee collector was sentenced to six months in jail and four years of probation and was forbidden to own, train, or breed dogs.
Read more about dogfighting, which is illegal but sadly still active in the United States.