Sue and the Booh

Sue Sheffield was a budding psychologist, right out of school and ready to help people with their problems. She advised Bradley to get in touch with his emotions and not hide from them. After the massacre, Sue didn't have the heart to help people anymore. She became a baker, and with her emotional support cat had a mediocre life. One day her friend asked her to fill in as head baker at a High Commission dinner.
When the bodies start dropping and the building goes into lockdown, it's up to Sue and her cat to solve things. Everyone else is a suspect.