The Demon Cat (or D. C., for short) is the ghost of a deceased cat that supposedly haunts the grounds of Washington D. C.'s government buildings.
This legend dates back to the days in which cats were used to kill rats that inhabited the Capitol. According to the legend, one cat made its home in the basement crypt of the Capitol building, and it never left from that spot. This cat is reported to have been seen by witnesses prior to national tragedies, like the Kennedy assassination.
It is also believed that the Demon Cat would pounce on anyone that would have an encounter with it, and that it can grow to the size of a tiger.