Bit of a tangent but does anyone know if there were any reported anomalous readings from the area that night - radar, weather stations, anything like that? I ask because triangular craft sightings have this pattern of clustering around large bodies of water and I've been tracking it for about two years now, Lake Michigan specifically keeps coming up in the data I've pulled from MUFON reports.
I wasn't there personally but a contact of mine in Chicago mentioned something odd in the sky around that time, she wasn't sure of the exact night though. If this is the same incident it would be the third corroborated sighting in that region since September which is not nothing.
Anyone who witnessed it - did it move in complete silence or was there any low frequency hum? That detail matters more than people realise when trying to narrow down the classification.