just behind the lady to his left, you can see part of the face of the woman who was pushing the stroller (her side temple and the reat of the side of her head. She has dark hair. The green thing is a blanket or coat on a kid in the stroller (3 wheel runner/jogger type). It is black and maroon or black and red with a full canopy folded back. Also the three women are together and are holding hands in a chain probably out fear a worried about getting separated from each other. They are marching past him.
That would be a valuable person, as well as the others, for them to be brave enough to come forth with what exactly they witnessed.
I say brave enough because, these days, people don’t trust the government and afraid to get envolved.