I saw a helicopter hovering over my neighborhood yesterday morning and then again in the evening, which reminded me of the end of Goodfellas, when Henry is being followed by helicopters all day.
Well, at least the evening incident has been explained: a cougar was shot half a mile south of my place.
http://www.wbbm780.com/Cougar-Shot-In-Roscoe-Village/2001618 I feel bad that they shot him/her instead of tranquilizing him/her. The cougar must have been so scared.