What should my brother do with the amounts exceeding what was stolen from him and with the other confiscated items besides his phone? And is it permissible for him to take the lawyer's fees from the excess money?

The excess amount is returned to the thief's family after deducting lawyer's fees, as these are binding on the wrongdoer. The seized items are returned to the responsible authorities, as they are more capable of investigation. Alternatively, one should strive to ascertain the thief's situation. If it is highly probable that the items are stolen, one should search for their owners, seeking assistance from the thief's family if possible. It is not permissible for him to take what does not belong to him.