I'm going to guess the money is with the overly supportive sister that received the emails and voicemails. He couldn't send it to dad, he's in jail. Perhaps the brother, IDK. At least it is being investigated, but I think that is why the phone was not being turned over. It may show that the money was being arranged for the day he took it out and the sister had some idea of what was going on.
I don't see arranging for the utilities to be cut off, or for your funeral before killing yourself as odd at all. You know whatever family members you leave behind have to take care of your bills and funeral, so some planning in advance is not unusual, and another reason why I think the sister received it.
Is it a code of some sort, it could be, but only the ones that received the message would understand it, so I expect the police will be talking with the family members again, and soon.
I don't see arranging for the utilities to be cut off, or for your funeral before killing yourself as odd at all. You know whatever family members you leave behind have to take care of your bills and funeral, so some planning in advance is not unusual, and another reason why I think the sister received it.
Is it a code of some sort, it could be, but only the ones that received the message would understand it, so I expect the police will be talking with the family members again, and soon.