The one time I saw HR and Legal actually get directly involved was when a worker I knew very well in another group was wrongfully terminated for absenteeism by a Director too stupid to remember he'd allowed the worker to work from home for a few days due to a family emergency in writing, and too incompetent to actually check that the worker was logged in and working which he was, and too arrogant because he FedEx'd a termination notice to the worker without going through Legal and HR.
If you're in Management, I'm just going to tell you that no matter how awesome you think you are don't ever try terminating an employee on your own recognizance. These days, it's a 9-month to 18-month process to get rid of useless/undesirable employees because HR and Legal have to play the "how do we not get sued here" game so they require ridiculous amounts of documentation and evidence. You try to short-circuit that process, you're going to be a part of that process.
Needless to say, this worker was somewhat incensed - and promptly threw everything including the kitchen sink and race card (there was nothing actually racist about the termination, but this worker figured they would attempt maximum retribution I think more for chuckles than any actual issues, this worker had a great sense of humor and knew exactly what buttons to press).
They took this person out to expensive lunches, made outrageous offers of raises and promotions, flew down members of the C-Suite, promised they wouldn't ever have to work for that Director ever again, etc... until they just settled it - this person got like three years worth of severance. Since this person was an expert he/she was working again after taking a couple weeks vacation at a better company making better money and much happier - the worker never had ANY intention of coming back and honestly just strung the whole thing out for as much time and money as possible because it was quite hilarious to everyone who knew about it.