I hope Howard gets an answer, because I can totally emphasize with him. Here's why: my Dad left when I was an infant in the 70s, never be heard from again; no child support was awarded either. Mom changed my last name from his to her maiden name when I was 4. I never even got so much as a card from him growing up.
Fast forward to 2001. I Googled my Dad and found his address. My plan was to drive up there, pound on his door, and demand an answer so that I could close that chapter of my life before I got married the next year. I chickened out and 2 years later he died.
When I contacted his church, I found out that no one (not even his widow) knew he had a child. I did have a phone conversation with the widow prior to the Memorial Service, which I attended with my Mom and Husband. She wasn't very kind to me on the phone, but she did give me the medical information I needed. After the service, she walked up to me (I had not introduced myself before the Service, I just sat in the back being as inconspicuous as possible) and said "Are you Carmen? If so, I am so sorry for what I said to you on the phone". I do resemble my Dad, and got some stares during the Service. I never spoke to her again, nor did I contest the Estate. I figured I managed (albeit in a struggling manner) without his help during his life, I could manage without it after his death. Furthermore, I felt like the widow had already received a punch in the gut finding out about me, why punish her for something he did?
My Mom passed in 2010, and I have discovered some things about their marriage I didn't know. My greatest regret in life is that I didn't get the answers from the them about everything before they passed. I sobbed during the episode about the letter from Howard's Dad because it hit so close to home. I hope Howard gets his answers, even if he doesn't realize he needs them.