minnesota life insurance company you lied to me st paul mn Nationwide

in was in july 2012.my son was killed by his wife,she had insurance on him .i called the insurance company and was told to wait intill the case went to court and i did that,i all so sent in paper work letting them know that i was  mother .i sent in police report and health history information request.they told me that his wife needed to sign some paper.well they never sent her no paper work.i need that she could nt get  the insurance money but i should have received it,i sent beneficiary statement and certified death certificate, not sure why they needed hishealth history he was only 33 years old,now i am left with helping to take care of his kids,he was a good father worked every day .