I’ve left the rest of the story in the first comment because Facebook won’t let me post the entire story here. What my father revealed after walking into that room made Ethan and Margaret realize they would never again be able to hide what had happened. That’s why I’ve put the continuation in the comments. 
If the link doesn’t appear, change «Most Relevant» to «All Comments.» 
Part Two
My father’s name was Arthur Bennett.
To Ethan and Margaret, he was simply the quiet man I rarely talked about.
They knew he had served in the military. They assumed he had retired years earlier and now spent his days living alone outside the city.
They were wrong.
The identification case on the table belonged to a federal investigative unit that worked with military families and handled domestic violence cases involving former members of the armed forces.
My father had left active duty, but he had never stopped working.
He looked at Margaret’s phone.
«You said you were calling the police,» he reminded her. «Put it on speaker.»
She didn’t move.
The confidence she had shown only moments earlier was gone.
Then someone knocked on the still-open front door.
