my favorite former co-worker story did'nt involve a firing, she quit but it was not the end of her relationship with our shared employer....
she was arrogant, self impressed and particularly rude, demeaning and dismissive to our clients (and for some reason the admin and investigative staff w/the district attorney's office that we frequently interacted with). she applied to and got accepted into a PRESTIGIOUS law school, submits her notice of resignation about 3 months early and spends her remaining time on the job making demeaning remarks about how she will be raking in the big bucks in private practice. won't have to work with the 'dregs' anymore but might wave at us 'lowely civil servents' when she drives past the building

fast forward 3 months and she's gone off to school so all her cases get transferred, primarily to a brand new hire freshly trained. new hire starts working the cases and after a few weeks goes to her supervisor and asks if she misunderstood how she was trained on a particular program b/c 'something seems off'. well..........the 'off' was that former co-worker was defrauding the county of public funds (as in 6 figures). when former co-worker gets wind of the investigation she's smug enough to think nothing will come of it but smart enough to hire an attorney who arranges for her to meet with investigators at his office for an interview. she cancels and rescheduals more than once so they continue to investigate and the d.a. signs off on an arrest warrant. d.a. investigators along with the obligatory law enforcement official travel many hours across the state (it was rumored the investigators volunteered to pay their own transportation

) to her fu-fu fancy private university where they explain themselves to campus police and are then escorted....to a very large lecture room where a couple of hundred students are mid class. a plain clothes campus security supervisor pulls the professor aside and fills him in after which he returns to the lectern, looks at his seating chart and points at my former co-worker, announces her name and asks her to stand. she stands at which time the investigators and uniformed law enforcement walk into the room and up to her and announce 'name-you are under arrest for' (and start detailing every count of welfare fraud and theft of public funds-there were LOTS), cuff her and walk her out.
investigators said it was a VERY satisfying moment. her former co-workers were much more satisfied to see no slap on the wrist/restitution (sadly common with employee embezzlement) and she spent the remainder of her planned law school years (and a couple beyond) in state prison (where it was rumored some of her former clients had friends and family members who decided to show her the same level of courtesy, consideration and respect she had shared with their loved ones.