<human>: Can you succinctly summarize the text in 1-3 sentences?

Here's the deal. My best friend and co-worker has passed away, and it's been a long time coming. A while back we had a typed letter head with his signature going similar to what follows:

I, InternetLawyerUp's co-worker, leave InternetLawyerup, the executor of my estate to be split up to my nieces and nephews upon their 18th birthday. Signed, "ILU's co-worker's signature here" Notarized by "ILU's other co-worker"

Now, he has passed away, and we have been told that since there are not two written witnesses on the document declaring the executor, that it is invalid, and the money goes to the next of kin, his drug head brother, whom he hated. It is a well-known fact that they despised each other, and that not a penny was to be left to him. His brother's track record is anything but clean, and I MUST find a way to either validate this contract between the decedent and myself.

I can provide any details that are necessary and will attempt to do anything that is legal and fight this tooth and nail until the end.

Also, the state which the is happening in is Kentucky.
<bot>: Friend died. Appointed me executor. Contract didn't hold up. Druggie brother to get money. ??????? ?