Koster's office defended U.S. District Judge Catherine D. Perry after she denied a motion for temporary restraining orders on six police officers enforcing a "5-second rule" that required demonstrators to move every five seconds or face arrest in Ferguson, Missouri, citing the need for law enforcement's protection of property and the availability of a "free-speech zone". However, at the time of this ruling, the free speech zone was off-limits to the public. This "5-second rule" was later determined to be unconstitutional by a different federal judge.