Not sure how much help this will be to you and DH, puddytats; the situation is the same but the circs are a bit different, but I'll go ahead anyway.
DH was once sacked from a job on grounds of "gross misconduct". The reason he was sacked was because the FD and MD wanted to replace him with someone else (pal of FD's) so couldn't make him redundant; he was accused of deleting files from the system - he was IT manager!!!! - and when he denied it they said he was lying, and that was the gross misconduct. (The MD said he "didn't like the stance he was taking".)
This happened in August 96; school holidays, kids then aged 3, 8, 11, 14. No payoff, no help from Social Security (because of "gross misconduct"). The shock and strain were enormous at the time.
They went on lying and lying and lying to the extent that he even began to question whether he had done what they said. We were incredibly lucky with 2 things; our local CAB had a really good employment law specialist who worked for them one day a week and he happened to be there the day it happened and was with us from then on, and a software house person who he had been working with trusted him implicitly and got him into the company he is still working at now.
We were supposed to go to tribunal although it dragged on almost until Christmas with them pratting about and changing dates but eventually they paid up - £9,500 (top limit then was £12,000 so CAB chap was well satisfied) - I was a bit disappointed that we never had the chance to face them down but CAB chap was relieved about that too because he was worried I might hit somebody.
DH was pretty much wrecked by the whole thing at the time - it was me that drove it on when they kept making derisory offers - and has never really had quite the same attitude or confidence at work since. But just to let you know that there really are some very immoral people out there who will do everything they can to wear you down.
(The MD concerned was Peter Ridsdale btw - some of you may have heard of him and know all about his morals )
Wishing you and DH the best possible outcome and that whoever is responsible for this gets properly punished. (But probably won't )