| When a man passes away without a will, his belongings go to his wife & children. Since his child is his only heir, everything will go to the child. If the child is a minor, somebody has to handle the assets for the child. The child's closest living relative now is his mother. That is probably why she is in charge of your brother's belongings & assets.
I honestly don't know what you can do about it. You definitely need a lawyer to fight this.
I'm not trying to be rude, but this is a prime example of why everyone with children should have a will. |