I thankfully didn't have to do that but earlier in my career who spent a year documenting a former coworker of mine who needed to be gone (I was the Union Steward at the time so was being kept apprised).
When the deed was finally done in this guy's case, he started stalking the supervisor and some of the employees.
People don't get that within the federal government, there is an "escalation" of actions that the supervisor must go through before going with anything draconian. E.g., "verbal warning", then "written warning", then maybe a "written warning with counseling", "administrative leave", "suspension", etc.
The troubling thing that has come out recently with these "firings" has been some agencies lumping recently promoted career employees with career-conditional ones, and treating them identically to new hires being "on probation". googly:
It just gets worse and worse. 
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