Vernon Hills or What?! (RARE) Undercover UKNKOWN DEPARTMENT Responding Code 3

we were at Vernon Hills at the time, and they never have forward facing blue lights. only in Chicago they have em. that was the most rarest catch of 2023 as of now, in addition to the siren. please tell me what department that is pleeeee

[@MidWestCatcher]

Could be Chicago in Vernon Hills ironically.