Does anyone have the flight path for the helicopter? (Tail number PAT25). FlightAware doesn't show it but it might have been tracked by open source ADS-B receivers. This helicopter was often utilized for VIP transport.
In this particular case it appears that the "PAT" part is an acronym for Priority Air Travel. In other words, it was a VIP transport flight (there may not have been any VIPs actually on board at the time).