The Mariposa Incident

The Mariposa Incident is the colloquial name for the events which occurred from January to November of 2014 in the city of Philadelphia, Pennsylvania. Known as the closest the magical community had ever come to being revealed before the Day of Heroes, it set the tone for that day by causing many inhumans (especially those in the eastern United States) to have a plan for their reveal. This is commonly believed to be one of the only good things that stemmed from this incident, as it was fraught with fear, injuries, fatalities, and mistrust.

Timeline of Events
On January 11, 2014, a coven of nine witches was found slaughtered in the leader's basement, each with a butterfly-shaped mark branded onto their right shoulder. The coroner's report placed their death two days earlier. The murder was widely reported in media for a number of reasons... most prominently, the lack of known murder weapon and the general occult themes of the crime and setting. While humans wrote it off as quirky or strange, some viewing it as a hate crime against pagan religions, members of the magical community could immediately tell of the magic's legitimacy.

Fear began almost immediately, due to the true assumption that it isn't easy to kill nine witches when they're all together. Suspicion was cast immediately upon two other witches, members of the coven who were unable to attend that meeting. The human police had the same idea, and those two witches were brought in for questioning. They were released upon proof of their alibis... however, that meant nothing to the magical community, and the two were all but exiled from inhuman spaces.