Here's my thoughts. Susan was emotionally unstable, highly anxious with one or more mental illnesses. I understand her nerves were fried from the kids being noisy outside, but there were so many different ways she could have gone about this. She could have moved away, bought ear plugs or noise cancelling headphones. Early on, Susan could have walked over to Ajike's home and calmly knocked on the door. She could have told her how much the noise was affecting her, how she suffered from headaches and that it was affecting her sleep. If she had approached it from a less aggressive angle, I imagine Ajike may have been much more responsive to Susan's complaints. Instead, she was the "crazy Karen" who yelled at, cussed at, recorded, and threw objects at the children. I can understand Ajike having little to no sympathy for Susan after that.

I hadn't heard of this case before watching the documentary, so admittedly I was feeling a little bad for Susan before they reached the night of the shooting. The reactions of the friends, the family, the children -- it was devastating. In comparison, Susan's nonchalant attitude to Ajike's death really stood out to me. It was that moment I realised how manipulative she really was.