The horn is from a Federal Signal 80k but it’s programmed into a Smart Siren - most likely produced specifically for SMPD. They also ran 80k’s on their Crown Vics before they were retired
You know it's an Active shooter emergency call when the obvious ambulance is also get to responded in usually in masse, but here there's no sign of it, so yeah it probably attempt to arrest someone not an active shooter call.
SMPD confirmed that the call was for an active shooter but it was deemed to be a false report. EMS was likely either staged nearby or cancelled while responding after PD secured the scene
