When I track down the doctor who treated my mother in the 1970s, I'm left with the uneasy sense that a minor medical procedure done four decades earlier has life-altering ramifications.

A DNA test turns up some shocking details about my identity. It means that everything I thought was true about my father could be wrong.

As a kid, my biological father was in and out of my life. Then, he disappeared entirely. When I finally found him again, it left me with even more questions.

Matt Katz has been searching for his father since he was a little kid. But it wasn't until his 40s that he realized he was on the wrong journey altogether.