It is a not uncommon problem that when somebody dies the nearest and dearest left behind are unable to find a will. Sometimes they just assume there isn't one. Sometimes they are sure that there is one, but they just can't find it. Sometimes they find one, but then somebody alleges that there was another one that was made later and therefore overwrites the one that's been found, but nobody can find the later one, even if it exists.
Sometimes the reason a will can't be found is because it's just been lost and sometimes it's because it's been deliberately destroyed.
All these situations have legal answers and a good lawyer can help you to solve them.