https://www.theguardian.com/uk-news/live/2017/mar/23/westminster-attack-parliament-resumes-tributes-keith-palmer-live
...probably seemed very well adjusted:
"Romek, 45, who has lived in Quayside in Winson Greenfor 12 years, confirmed she knew the London terrorist when she was shown a photograph of him on the stretcher.
I have been so shocked by it all. They were a nice family, very reserved. He was very calm. I saw the photos on the TV and knew it was the man who lived here. He had a wife, a young Asian woman, and a small child who went to school."