131 Why?

Half an hour before Fade and John were pointing their rifles at each other, Catherine Walker was safely tucked in her panic room. Inside the panic room were numerous monitors that show every corner of the building she was in. There was also a computer that controlled the various things inside the building.

Catherine was feeling extremely agitated as she was thinking of the reason Fade choose to kill her first among the other big bosses. Among the remaining big bosses she was the lesser evil, so then why was she chosen to die?