It looks like that article was posted hours before the shooting, but it’s not impossible that Bishop was acting in a way that led people to recently look into her past. Some of the staff may have felt threatened and asked for an assessment about what she might be capable of. She had been acting strangely, it seems.
The time line looked close and it seemed out of character for a former DA to make a decision that rashly but it is curious. Just a coincidence I guess. Let’s see how long it takes Delahunt to say anything of substance. The longer it takes, the more likely he’s getting his story straight and did cut Amy Bishop loose for a reason that had nothing to do with the facts of what she did.