The chat line that is on that cam seems to be lots of people who know each other and also the cam operators. For example a person on the chat will make a comment, and within a very short time frame (minutes) the cam will zoom in response.

When the starling was "taken care of" the content of the chat became disrespectful and it was temporarily closed until the comments settled down. The moderator there did not want joking or gruesome statements because in nature all sorts of unpleasant things happen. I found that action very interesting!

The general consensus was that the starling may have made motions against one of the chicks...the one who typically sits near that opening to the starling nest. I saw more than once a starling with a beak full of bugs/worms coming to feed their chicks and the hawk chick made lunges toward it several times over a couple of days.

In the video linked by the moderator there, that chick observes and watches its parent kill the starling, which was a protracted event. So it was unfortunate for the starling but instructional for the hawk chick!

We have alot of starlings here...they can be raucous and loud etc. In severe winters they will come to our suet feeder and push the other birds away like the woodpeckers and nuthatches and chickadees.