The diamond ring that Dad bought for Mom was stolen at home!

This matter, even if the police intervene, is not easy to handle, what's more, it will directly freeze the relationship with relatives, and it may not necessarily get a good result. Find it yourself first. If you really can't find that important ring, you can try to pay attention to whether the person you suspect has a special income or be nice to him from the side. It's not a matter of value or money to be sad about losing the ring. The commemorative significance is really important. Maybe he'll give it back, if he does take it. Anyway, the soft method should be better than the hard method.