For centuries theologians have argued about how the sins of the father might fall upon their children.  Freud talked about the need for a father's protection of his children. And Geoffrey and Tobias Wolff showed us how a deceptive father can impact his sons.

As children have to cope today, with so many fathers in prison, for crimes all the way up to murder, it’s almost a public policy concern how this plays out.

But what if a child didn’t know, at least not until his 40’s, that his father was an infamous serial killer who had never been caught or brought to justice?

That’s what Gary Stewart discovered about his father. Stewart came to believe his father was the infamous Zodiac Killer, who stalked Northern California in the late 60’s.

That’s the story that Gary Stewart now shares with the public, in his book The Most Dangerous Animal of All: Searching for My Father . . . and Finding the Zodiac Killer.

My conversation with Gary Stewart: