诚谢l老貓！！quick answers in English below:

(I) 你與借款人的關係,借款的形式,數額,如何借貸,期限...  Friend, emergency loan/promisory note <= 6months

(II) 他的死因 (是否可預知),或是意外.   Yes, unexpected (on working site)

(III) 他的配偶是否知道借款的安排,當事人是否使用夫妻共同帳戶來轉移借款...Yes, she deposited my loan checks

(IV)　你提及當事人曾哂妹摦a來避免一個訴訟,這個程序發生在何時？（借貸前或是借貸後）同時是什麼樣的訴訟,... After the loan

(V) 對方在過世前是否有計劃與原配離婚,如果答覆是肯定的,是否已經 file 案件... no, never

(VI) 當事人的配偶是否知道這個借貸的安排,是否有任何口頭的同意..... yes, she knew everything and wrote/signed multiple interest payment checks

(VII) 當事人是否留有遺囑,如果有(這是最好)內容為何,同時是否已經完成 probate 的程序?  No will, probate opened per our presure but little progress

(VIII)借款數字與對方個人所剩資產相差的比例... the adult daughter hid assets/value of business eqipments/tools and I have some evidence

Glad you think I have a case, I am keeping the probate lawyer for now and am hiring another lawyer who has beat them in a recent case.
Hope it's not throwing good money after bad and justice will prevail...  it's heart-broken for us...we feel like the farmer who saved the dying snake & then got bitten

With the info above, pls advise. Many thanks!!!