So my grandfather a Marine Vet. ,awarded many medals including Purple Heart and Bronze Star and whom I am very close to, has been explaining to me about a story that happened back in the 80s where a dear buddy of his had owed him some money and eventually passed away. His wife still wanted to settle the debt and my grandfather being a humble man told her to forget it, well she still wanted it settled and so she decided to give my grandfather a gun collection since she had no use for them (roughly 7-9 rifles and shotguns).Well time passes and those guns sat in crates and eventually had to be transported to there current residence. My grandfather asked my uncle (only so by marriage) to do so since he had the rig to do it and to store them for the time being, this was about 6 years ago, and recently my grandfather had other plans for this collection. Gramps inquired to his son-in-law (uncle) about said collection about 2 weeks ago since he was still in possession and asked for them back, he told him to come over the NEXT day and get them. So he shows up, they had breakfast and then the topic came up for the guns.... well my uncle right off he bat said "what are you going to do, sell them from underneath me?" to which my aunt replied "they aren't even your guns". A few min later they went to the room where the crates were being stored and my uncle opened them up and to my grandfathers surprise there were only 2 guns left (one in each crate). The rest of the day my uncle was totally quiet and since then has been basically ignoring them. From what I know of my uncle in the 9 years that he has been in this family, he has been somewhat manipulative and egotistical and I'm not saying any of this to "bash" him but I do fully backup my grandfather over this man and I want to step in and say something but that is where my dilemma is coming in, even though I know my grandfather won't take it to the next step because he doesn't want to start anything with his daughters husband. Everyone who knows this story still knows he has the guns but don't know where. We live in a state where FTF is commonly used and some do a point of sale which is proof, my grandfather has none since they were given to him many years ago to settle a debt and then entrusted them to his son-in-law . So at this point my grandfather is basically screwed. What do you think should/shouldn't be done at this point.