I don't know how to handle this case, I have two junior brothers in my small town who lives opposite to my house, one help the other to create a trust wallet and 100$ worth of Ethereum was deposited into the wallet, two days later the fund was moved out to am unknown address, after asking few questions from the wallet owner I found out that the other guy has access to the wallet too, I believe he did the dirty trick because he never warned the wallet owner to never share his recovery seed with anyone..if you are in my shoe what will you do..
Which of the guy? Is it one of your brothers that moved the fund from the wallet? That is why when it comes to money there is no brother or sister again, even husband and wife are dishonest when comes to money. Well I don't have too much to say about the case. One thing was that there was trust from the other from the other brother that his brother would not betrayed him but it has happened and you won't kill him so if he still has the fund in his wallet, he should return the money to the brother and let the brother create another wallet and move the funds to the new wallet. And he should not trust anyone concerning money. For him to have happy mind with others, he should steer clear with people about Money. But if they are not brothers, the one that moved the fund to his wallet is a thief. And a dishonest friend and he should not move with that friend again because he would do him something bigger.