From NPR, this is hidden brain.
I'm Shankar Vedantam.
On the night of the murder, there's bad weather in Boston.
It was a rainy night and I went back to the foster home.
Fred Clay knocks on his foster mother's door.
It's late autumn, 1979.
Fred has been away for a few days visiting his cousins and mother in a neighborhood known as Rosslindale.
He knows he is probably in trouble with his foster mother.
He hadn't told her he was taking off.
I didn't ran away.
I just went out and didn't come back for a few days.
A man opens the door.
It's his foster mother's son.
He let me in the house and he was telling me that his mother wanted to talk to me about me not being there for the last few days.
Thankfully for Fred, his foster mother isn't home.
She's at church.
And so he let me in and I went back to my room.
I watched a load of tv, I got something to eat, and I eventually.
Fell asleep around 930.
As Fred sleeps, his foster mother returns home.